Sienna Miller’s Daughter Marlowe, 12, Looks All Grown Up as They Pose Together in Rare Appearance

Sienna Miller’s daughter looks all grown up!

The actress, 44, brought her 12-year-old daughter Marlowe with her as they attended her sister Savannah Miller’s Bridal Ballerina Breakfast in London on Tuesday, April 1. In the photo, Miller smiles alongside her lookalike daughter, both opting to wear their wavy hair long.

Another snap shows Marlowe, Miller and the star’s 28-year-old boyfriend Oli Green, who can be seen putting an arm around Miller.

Alongside Marlowe, Miller is mom to a second daughter, whom she welcomed in January 2024 with Green.

Speaking with PEOPLE in June about Horizon: An American Saga, the actress revealed that she adopted a rabbit after her then-11-year-old daughter Marlowe visited the movie’s set.

“It was a great set to have kids on because there are animals everywhere, and everybody’s in costume,” Miller said of the Western epic directed by Kevin Costner.

“It is very familial, because he’s a dad of many kids, and everybody’s welcome,” she added. “It’s a very open, gentle set.”

Miller went on to share that the movie’s director of photography, J. Michael Muro, and his wife breed rabbits, which is how she came to find her new pet.

“So on a night shoot, [Muro’s wife] turns up with six baby bunnies, and it’s 2 a.m., and you’re just stroking a baby bunny,” she recalled. “My daughter then comes to the set and hears that there are baby rabbits, so we now have a rabbit.”

Miller said she “smuggled” the bunny, named Cloudy, on a plane back to New York from Utah, where she was filming Horizon.

“I pretended it was a cat,” she continued. “I just hid the ears. I was like, that’s my kitten.”

Earlier that same month, Miller opened up about her daughter’s passion for fashion in an interview with The Guardian. Calling her “a little fashion monster,” the proud mom went on to say that she’s already taking after a few fashion icons.

“She’s so stylish. And very critical,” she said. “She’s like a young Anna Wintour in her total disdain for some of the things I wear.”

“In New York, she thought I was mortifying. She wishes I would brush my hair. Although now that we’re back in England she’s starting to appreciate the undoneness.”