ET was on the red carpet for the Black or White movie premiere, where star Kevin Costner's 28-year-old daughter Lily made a rare appearance.
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In the movie, Kevin plays a widower who finds himself in a custody battle over his granddaughter with the child's paternal grandmother (Academy Award winner Octavia Spencer). Lily sings in the movie.
"She's a beautiful singer," Kevin told ET. "Originally someone else was going to sing Black or White, but they wanted more money than I had. Finally it turned out to be better."
The Oscar winner was flanked by both his daughter and wife of a decade Christine Baumgartner at the Los Angeles premiere on Tuesday, where Christine donned a sheer black top and midi skirt and Lily opted for a show-stopping salmon-colored gown with a thigh-high slit.
"I just look at [Lily] and adore her," Kevin said.
VIDEO: Behind the Scenes of Kevin Costner's Black or White
Kevin's family entourage for the night was fitting as the movie deals with familial issues, but it also tackles love and race in modern America -- a topic Kevin was passionate about showing on the big screen.
"We're good at looking backwards -- Selma-- but Black or White seemed to be an authentic look at where we're at in the country today with race," Kevin said.
The 60-year-old actor also acted as a producer on the film, investing his own money to ensure that the movie got made. After the movie was made, it was brought to St. Louis where Kevin appeared at a local screening. Kevin explained why it was important to bring the movie there in light of the racial unrest in Ferguson.
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"People watched it and said they could have a conversation," Kevin said. "People watched it and actually laughed. People said they cried. I'm not afraid of the movie. That's why I made it. I'm not afraid to take it to St. Louis."
Black or White opens Jan. 30.