Sienna Miller Brings Daughter to ‘Horizon’ Premiere at Cannes Movie Competition

Sienna Miller had a particular fan by her facet on the 2024 Cannes Movie Competition!

The actress, 42, attended the world premiere of Horizon: An American Saga with her daughter Marlowe, 11. She was additionally joined by her boyfriend, Oli Inexperienced. 

For the large occasion, the actress wore a semi-sheer dusty blue robe with a ruffled cape. She paired the formal apparel with strappy silver heels.

Miller embraced her daughter — who was wearing an lovable pink and white A-line gown — as they posed for pictures collectively.

The American Sniper actress shares Marlowe together with her ex Tom Sturridge, whom she dated from 2011 to 2015. She additionally has a daughter, born in January, with Inexperienced, 27.

The PEOPLE Puzzler crossword is right here! How shortly are you able to resolve it? Play now!

Miller and Inexperienced have been romantically linked since February 2022 and made their purple carpet debut on the Self-importance Honest Oscar get together the next month.

In December 2023, the actress opened up about the pair’s 15-year age distinction in a canopy story for Vogue, saying, “I might think about it could be sophisticated for anybody to get their head round, however there’s been nothing however love and pleasure.”

Miller’s upcoming film Horizon is directed and co-written by Kevin Costner, and “chronicles the unimaginable epic journey of the enlargement of the American West, earlier than and after the Civil Warfare,” in keeping with a synopsis.

“Between the Native Individuals who noticed their lands getting colonized and those that have been decided to settle there, generally at any price, historical past is being written,” the synopsis continues. “In a flamboyant fresco the place a number of destinies intertwine, goals and hopes face obstacles and cruelty to supply a cinematic spectacle of outstanding scope and emotional depth.” 

Miller performs maternal pioneer girl Frances Kittredge, who was dropped at the Horizon settlement by her husband.

The Anatomy of a Scandal actress is joined by two-time Academy Award winner Costner, Sam Worthington, Jamie Campbell Bower, Isabelle Fuhrman, Luke Wilson and extra within the solid.

Costner, 69, attended the occasion accompanied by 5 of his seven kids on the purple carpet: Annie, 40, Cayden, 17, Grace, 13, Lily, 37, and Hayes, 15 — the latter of whom seems in Horizon alongside his father.

Forward of the premiere, Costner advised PEOPLE that he was “taking seven of the ladies which are within the film” to Cannes to have a good time their “big contribution” to the mission.

“Girls are the explanation the nation goes ahead,” he defined. “They have been taken usually towards their very own needs. They have been taken benefit of and so they have been resilient. I could not inform the story except it revolved round them.”

In the identical interview, the Yellowstone star revealed what drew him to casting Miller within the film, calling her “one in every of our nice actresses.”

He mentioned: “Her outward magnificence is simple, however she’s so expert as an actress.”

By no means miss a narrative — join PEOPLE’s free every day e-newsletter to remain up-to-date on the perfect of what PEOPLE has to supply​​, from movie star information to driving human curiosity tales. 

Horizon: An American Saga Chapter One and Chapter Two are set to open in theaters on June 28 and Aug. 16, respectively.