Annie Costner is the eldest daughter of actor and filmmaker Kevin Costner and his first wife, Cindy Silva. She acted in several films as a child and young adult, later co-founded the documentary company Sound Off Films, and now works in California real estate under the professional name Annie Clayton Cox.
Her career is more varied than many short celebrity profiles suggest. Although she grew up around Hollywood, Annie built much of her adult work around environmental advocacy, nonfiction storytelling and, more recently, residential real estate.
Quick answer: Who is Annie Costner?
| Question | Answer |
|---|---|
| Who is Annie Costner? | Kevin Costner and Cindy Silva’s eldest child, a former actor, a documentary filmmaker and a current real-estate professional |
| How old is she? | 42 as of July 29, 2026 |
| When was she born? | April 15, 1984 |
| What is she known for? | Brief film roles, co-founding Sound Off Films and directing or producing cause-focused nonfiction work |
| What does she do now? | She works as a Berkshire Hathaway HomeServices real-estate sales associate in the Ojai, California, area |
| Is she married? | Yes. She married physician Danny Cox in July 2016 |
| Does she have children? | Her current professional biography says she and her husband have two children |
Annie Costner key facts
| Fact | Detail |
| Public name | Annie Costner |
| Current professional name | Annie Clayton Cox, also styled Annie Cox |
| Date of birth | April 15, 1984 |
| Birthplace | Los Angeles, California |
| Parents | Kevin Costner and Cindy Silva |
| Family position | Kevin Costner’s oldest child |
| Education | Bachelor of Arts from Brown University |
| Early screen debut | Dances with Wolves in 1990 |
| Production company | Co-founded Sound Off Films in 2014 |
| Spouse | Dr. Danny Cox |
| Children | Two, according to her current professional profile |
| Current work | Real-estate sales associate in Ojai, California |
Who is Annie Costner?
Annie Costner is a former child actor and filmmaker whose public profile began through her father’s movies. However, acting never became the main focus of her adult career. She moved toward environmental work, documentary production and other business projects before entering real estate.
She is also the same person whose current professional pages use the names Annie Cox and Annie Clayton Cox. That name change reflects her marriage, not a separate identity. Film databases generally retain “Annie Costner” or, for one credit, “Anne Costner.”
Her best-known childhood appearance came in the 1990 Western Dances with Wolves. Later, her work behind the camera included The Discarded: A Tale of Two Rios, a short documentary about pollution and community life around Rio de Janeiro’s Guanabara Bay.
Is Annie Costner Kevin Costner’s oldest child?
Yes. Annie is the first child of Kevin Costner and Cindy Silva, who married in 1978 and later divorced. She was born in Los Angeles on April 15, 1984.
Annie has two full siblings from that marriage: Lily Costner and Joe Costner. She also has four younger half-siblings through her father: Liam, Cayden, Hayes and Grace. Therefore, she is the eldest of Kevin Costner’s seven children.
That family connection explains why many searches define her primarily as “Kevin Costner’s daughter.” Still, her adult record includes distinct work in advocacy, film production and real estate. A general overview of Kevin Costner’s career and family provides broader context, but Annie’s professional path deserves separate treatment.
What movies was Annie Costner in?
Annie’s acting work consists mainly of brief or supporting appearances. She did not build the long leading-role filmography that the label “actress” can imply. Instead, her selected credits span childhood cameos, small character parts and one later short-film role.
| Year | Title | Role or credit | Context |
| 1990 | Dances with Wolves | Young Christine | Brief flashback appearance at age six |
| 1995 | Waterworld | Atoll Girl | Uncredited small role |
| 1995 | The Baby-Sitters Club | Annie | Supporting appearance |
| 1997 | The Postman | Ponytail | Credited as Anne Costner |
| 2010 | Lazy Teenage Superheroes | Melody | Short/video project |
Her role in Dances with Wolves
Annie played the young Christine, the childhood version of the character better known as Stands With A Fist. Turner Classic Movies describes Kevin Costner’s six-year-old daughter making a brief appearance in a flashback sequence.
The film’s prestige sometimes creates confusion about Annie’s personal achievements. Dances with Wolves won seven Academy Awards, including Best Picture and Best Director, according to the Academy’s official 1991 ceremony record. Those were awards for the film and its credited recipients, not individual awards for Annie.
In addition, the Library of Congress added the film to the National Film Registry in 2007. Annie’s role was small, but it connected her earliest screen work to one of her father’s most consequential projects.
Her later acting credits
Annie appeared again in 1995, first in an uncredited part in Waterworld and then in The Baby-Sitters Club. Two years later, she played Ponytail in The Postman, another film directed by and starring her father.
She returned for the 2010 short Lazy Teenage Superheroes. However, the available record does not show a sustained acting push after that project. As a result, “former actor” is more accurate than describing acting as her current profession.
What did Annie Costner study?
Annie earned a Bachelor of Arts from Brown University. Her current professional biography confirms the degree, although no first-party Brown source located for this profile specifies her major or graduation year.
Some entertainment databases say she belonged to Brown’s class of 2006, while scraped directories identify Latin American Studies as her field. However, those details lack the same source quality as the degree itself. Therefore, a careful biography should stop at the verified BA unless stronger documentation appears.
Her education preceded work in politics, water advocacy and environmental communication. According to her current professional profile, she helped run campaigns to conserve waterways and elect pro-environment candidates. It also names Clean Water Action and Waterkeeper Alliance in that earlier career.
Annie later helped establish a family business focused on global wastewater-treatment technology. That work provides useful context for her transition into environmental documentary storytelling: the subject matter changed, but water and conservation remained recurring themes.
How did Annie Costner move into documentary production?
Annie shifted toward nonfiction storytelling after working in advocacy and environmental business. Rather than pursue conventional acting roles, she began helping shape projects about social, cultural and ecological issues.
She met producer Adrienne Hall while both were working on Racing Extinction, according to Sound Off Films. The two then co-founded Sound Off in 2014. Consequently, Annie’s most substantial entertainment work developed behind the camera rather than in front of it.
The company combined documentary techniques with branded and nonprofit storytelling. Its public portfolio has included environmental films, institutional media and projects connected to organizations or brands. However, a company credit does not automatically prove that Annie personally produced every title on that portfolio.
The Discarded: A Tale of Two Rios
One project with a clear Annie Costner credit is The Discarded: A Tale of Two Rios. Annie and Carla Dauden directed the 2016 short, while Sound Off Films produced it.
The film examines pollution in Guanabara Bay before the 2016 Summer Olympics. More importantly, it centers people living with the consequences, including sailors, residents, artists and activists. The Wild & Scenic Film Festival lists Annie Costner, Adrienne Hall and Carla Dauden among the filmmakers and identifies it as a 19-minute 2016 production.
The documentary later appeared on festival programs, including the 2017 Santa Barbara International Film Festival. Sound Off’s site also lists recognition from environmental film festivals. Thus, the project offers firmer evidence of Annie’s directing interests than generic lists of company clients do.
Mosaic of Change and other nonfiction work
Annie also worked on Mosaic of Change, a multimedia storytelling initiative designed to present social and cultural information visually. UNESCO confirms that the platform formally launched at its Paris headquarters on November 16, 2015, during the organization’s 70th-anniversary period.
Sound Off’s portfolio has also featured projects such as the ESPN 30 for 30 shorts Bump and Spike and The Pittsburgh Drug Trials, behind-the-scenes material for Katy Perry’s Witness tour, and other conservation-focused work. Still, the safest approach is to attribute this slate to the company unless an individual credit specifically names Annie.
What is Sound Off Films?
Sound Off Films describes itself as a mission-driven production company focused on documentary, natural-history and branded content. Its About page says Annie Costner and Adrienne Hall founded the business in 2014 after meeting while working on Racing Extinction.
The company’s stated focus includes conservation, equal rights, sustainability and social justice. It has also said it donates a share of its production fees to organizations addressing those causes. Therefore, Sound Off grew from the same environmental and advocacy interests that appear in Annie’s earlier work history.
For Annie’s biography, the most precise title is “co-founder of Sound Off Films.” That description recognizes her role in creating the company without assuming she still manages its daily business.
What does Annie Costner do now?
As of July 29, 2026, Annie works in residential real estate in California. Her current Berkshire Hathaway HomeServices profile lists Annie Clayton Cox as a sales associate based in the company’s Ojai office.
The profile says she serves markets across Ventura and Santa Barbara counties. It also describes her as a Luxury Specialist and a member of the company’s President’s Circle, which it says represents the top 5% of agents nationally.
This role is not unrelated to her earlier experience. For example, her biography emphasizes campaign work, entrepreneurship, communications and production—fields that require research, negotiation and project management. However, real estate is the clearest answer to the question “What does Annie Costner do now?”
Her current use of “Annie Clayton Cox” also helps reconcile apparently different search results. The current agent profile, earlier environmental work, Brown degree, production-company history, physician husband and Ojai residence all align with the public biography of Annie Costner.
Is Annie Costner still involved with Sound Off Films?
Public evidence confirms that Annie co-founded Sound Off Films, but it does not clearly establish an active operating role in 2026. The company’s About page still names her as a founder, while its current team section lists Adrienne Hall as executive producer and names other staff members without listing Annie.
Meanwhile, Annie’s current Berkshire Hathaway biography describes Sound Off as part of her career before real estate. Therefore, “Sound Off Films co-founder” remains accurate as a historical credential. “Current Sound Off executive” would go beyond the available evidence.
That distinction matters because many biography pages copy old job descriptions into the present tense. A dated source provides a better picture: Annie now publicly markets real-estate services, while Sound Off remains an important part of her career history.
Who is Annie Costner’s husband?
Annie married Dr. Danny Cox in July 2016. Contemporary reports placed their wedding at Kevin Costner’s property in Carpinteria, California, near Santa Barbara.
Danny Cox is a physician. Annie’s current professional biography says she lives in Ojai with her physician husband, their two children and two cats. It does not needlessly publicize the children’s names, and a responsible profile should follow that lead.
The marriage also explains why current business pages identify her as Annie Cox or Annie Clayton Cox. Nevertheless, “Annie Costner” remains the name most closely associated with her film work and public family identity.
Does Annie Costner have a verified net worth?
No authoritative public source establishes Annie Costner’s net worth. Celebrity-biography pages publish specific estimates, but they generally provide no financial statements, asset disclosures or transparent calculation.
Her father’s wealth does not reveal her personal finances. Likewise, film credits, a company founder title and real-estate listings do not provide enough evidence to calculate what she owns. The accurate answer is that her net worth remains private and unverified.
Annie Costner timeline
| Year | Milestone |
| 1984 | Born in Los Angeles on April 15 to Kevin Costner and Cindy Silva |
| 1990 | Appeared as young Christine in Dances with Wolves |
| 1995 | Had small roles in Waterworld and The Baby-Sitters Club |
| 1997 | Appeared as Ponytail in The Postman |
| 2010 | Appeared in Lazy Teenage Superheroes during the broader period when her career moved toward advocacy and nonfiction work |
| 2014 | Co-founded Sound Off Films with Adrienne Hall |
| 2015 | Mosaic of Change formally launched at UNESCO headquarters in Paris |
| 2016 | Co-directed The Discarded: A Tale of Two Rios and married Danny Cox |
| 2017 | The Discarded appeared in the Santa Barbara International Film Festival program |
| 2026 | Publicly works as Annie Clayton Cox, a Berkshire Hathaway HomeServices real-estate sales associate in Ojai |
Frequently asked questions
1. How old is Annie Costner?
Annie Costner is 42 as of July 29, 2026. She was born on April 15, 1984, in Los Angeles.
2. Who are Annie Costner’s parents?
Her parents are Kevin Costner and his first wife, Cindy Silva. Annie is their oldest child and has two full siblings, Lily and Joe.
3. What is Annie Costner’s full name?
She is widely known as Annie Costner. Her current real-estate profile uses Annie Clayton Cox, while some film credits use Anne Costner.
4. What movies did Annie Costner appear in?
Her selected credits include Dances with Wolves, Waterworld, The Baby-Sitters Club, The Postman and Lazy Teenage Superheroes. Most were brief or supporting roles.
5. Did Annie Costner go to Brown University?
Yes. Her current professional biography confirms that she earned a BA from Brown University. A major and graduation year were not confirmed through a first-party university source for this article.
6. What is Sound Off Films?
Sound Off Films is a production company that creates documentary, natural-history and branded content. Annie Costner and Adrienne Hall co-founded it in 2014.
7. What does Annie Costner do for a living now?
As of July 29, 2026, she works in California real estate. Berkshire Hathaway HomeServices lists her as an Ojai-based sales associate under the name Annie Clayton Cox.
8. Is Annie Costner married?
Yes. She married physician Danny Cox in July 2016. Current professional information places the couple in Ojai, California.
9. Does Annie Costner have children?
Yes. Her current Berkshire Hathaway biography says she and Danny Cox have two children. Reliable public sources do not need to identify the children for readers to understand Annie’s biography.
10. What is Annie Costner’s net worth?
Her net worth is not publicly verified. Specific figures on celebrity sites lack reliable documentation, so they should not be treated as facts.
Conclusion
Annie Costner is more than a familiar surname in a Hollywood family. Her record moves from small childhood film roles to environmental advocacy, documentary production and the co-founding of Sound Off Films.
Today, the clearest verified update is that she works in Ojai-area real estate as Annie Clayton Cox. That current role, together with her filmmaking history, gives a more complete and accurate picture than profiles that describe her only as Kevin Costner’s daughter or an actress.
