There’s no milling around in Sienna Miller‘s household.
After all, her and ex Tom Sturridge‘s 11-year-old daughter Marlowe is busy being a big sister to the baby girl she recently welcomed with boyfriend Oli Green.
“Initially, it was a lot for her,” Sienna shared of the tween in an exclusive interview with E! News correspondent Will Marfuggi at the Los Angeles premiere of the Horizon: An American Saga June 24, “and now she is in heaven.”
In fact, the actress noted that her 6-month-old is “already idolizing” Marlowe and “beaming every time she sees her.”
“Now that the baby can react,” Sienna said, “[she] is clearly in love with her big sister.”
As for how Sienna is adjusting to the family’s new addition? The 42-year-old joked that her main summer plan is to catch up on some shut-eye.
“Maybe a bit of sleep,” she quipped. “I have a new baby.” (For more from Sienna’s interview, tune into E! News tonight, June 25, at 11 p.m.)