Kevin Costner's Gorgeous Daughter Lily Steals the Spotlight at Premiere

Black or White might be Kevin Costner's new movie, but at the Los Angeles premiere for the film on Tuesday, it was the star's wife and daughter who stole the show. In fact, upon first glance at photos from the evening, it's difficult to tell which gorgeous blonde is which.

Both Christine Baumgartner, Kevin's 40-year-old wife, Lily Costner (Kevin's 28-year-old daughter) stood beside him. As stunning as Baumgartner is, however, we couldn't help but be captivated by Lily.

Christine Baumgartner, Kevin Costner, and Lily Costner at the premiere of 'Black or White' (Jason LaVeris/FilmMagic)
Christine Baumgartner, Kevin Costner, and Lily Costner at the premiere of 'Black or White' (Jason LaVeris/FilmMagic)

Clad in a slinky red cutout dress and simple black heels, she looked every bit the part of a movie star… even though she isn't one (technically). So, who is this beauty, exactly? Here's everything you need to know about Lily Costner.

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Lily is the second-eldest in a very large, very modern family. Born in 1986 to Kevin and Cindy Costner, Lily has two full siblings (Annie, 30, and Joe, 26) as well as a whopping four much younger half-siblings (Liam, from Kevin's brief relationship with Bridget Rooney, as well as Cayden Wyatt, Hayes Logan, and Grace Avery, whom Kevin shares with Baumgartner).

Though Lily hasn't exactly followed in her father's footsteps to make acting a fulltime career, she has dabbled in Hollywood just the same. She made her silver screen debut when she was just 9 years old in the 1995 film based on the popular tween book series, The Babysitters Club. Two years later, she worked alongside dear old dad in his post-apocalyptic drama, The Postman. It appears that was enough of the movie industry for her however, as she never moved on from child star to grown-up roles (unless you count her serving as Miss Golden Globe back in 2004, which we don't).

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But that doesn't mean she didn't inherit any of her dad's desire to perform: Lily has pursued her love of music instead. Much of Lily's performing has been with her father and his band, Modern West, but she has also worked with others, including singing "Silent Night" with country crooner Trace Adkins and collaborating with the Connecticut-based rock band The Alternate Routes. In 2013, she sang "Oh, Malley-Mae" live at the Grand Ole Opry while her father backed her up on guitar. (That takes some guts, people!)

"Lily is an amazing singer and songwriter," Kevin told the Huffington Post last year. "She can be a really huge star if that's what she wanted. I'm not sure she wants that. She's really gifted. Lily's way is not to knock doors down. I think she wants a quality of life. She's seen the quality of life that we've had and sometimes the idea of stardom, I think, is a mystery to her. She's content with performing. She's not a person who is trying to angle how to go faster and go higher and go larger. It's just not how she's built. She has an amazing talent. Does she want to give it to the world? I don't know."

Lily Costner at the Rome Film Festival (Venturelli/WireImage)
Lily Costner at the Rome Film Festival (Venturelli/WireImage)

Lily regularly spends time offstage with her famous father as well. Her appearance with Kevin at the premiere Tuesday night was hardly her first time on the red carpet. Last October, she stunned in a lace jumpsuit and cat-eye sunglasses at the Rome Film Festival, joining her dad for one of Black or White's first press conferences.

All things considered, though, Lily still flies relatively under the radar — but with those looks and that voice, this may not be the case for long.