Sienna Miller attended the premiere of her film Horizon: An American Saga at the Cannes Film Festival, accompanied by her boyfriend Oli Greene and her daughter Marlowe.
The outing marked Marlowe's first-ever red carpet appearance, with the actress previously only showing her daughter’s face in a Vogue shoot in July 2020.
The 42-year-old actress shares her 11-year-old daughter with ex-partner Tom Sturridge, with whom she was in a relationship from 2011 to 2015.
Miller recently welcomed her second daughter and first child with Greene, 27, in January.
At the star-studded event for the western epic on Sunday, Miller dazzled in a pale blue flowing Chloé gown while Marlowe looked charming in a simple white dress adorned with a pink bow.
Joining the pair on the carpet was the Hollywood star’s boyfriend. who looked dapper in a black suit.
In addition to her family, Miller received support from Alexa Chung, who is dating Miller’s ex and Marlowe's father, Tom Sturridge.
The pair are believed to have formed a close bond with Chung and Sturridge frequently seen spending time with Miller and Greene.
The British actress previously praised their family dynamic, calling it "genuinely very loving, cozy, and great. It's ideal. It's incredible. We are very lucky."
Elsewhere on the carpet, Miller was joined by her co-stars, including the film's director and lead star, Kevin Costner.
Costner, 69, looked dashing in a black three-piece suit. Like Miller, he made the premiere a family affair by bringing along his youngest child, 13-year-old daughter Grace.
Horizon stars Ella Hunt, Abbey Lee, and Jena Malone made glamorous red carpet appearances, while Oscar winners Julianne Moore and Michelle Yeoh also showed their support for the film.
Models Candice Swanepoel, Josephine Skriver and Camille Rowe added a touch of style to the evening’s proceedings in their designer couture on the carpet.
Horizon: An American Saga chronicles the expansion of the American West before and after the Civil War.
Between the Native Americans who saw their lands getting colonized and those who were determined to settle there, sometimes at any cost, history is being written.
The three-hour movie is the first chapter of a planned four-part series directed by and starring Costner.
After premiering at Cannes, the feature received a near 12-minute ovation after the credits began rolling, according to Deadline.
