Julianne Moore watched a stranger give birth to prep for “Nine Months”

The Oscar winner plays a pregnant woman in the 1995 rom-com opposite Hugh Grant.

Oh, baby.

Julianne Moore watched a stranger give birth to prepare for her role in Chris Columbus' 1995 rom-com Nine Months. The Oscar winner recounted the anecdote during Wednesday's episode of Jimmy Kimmel Live!, explaining to the late night host that the research method was long before she welcomed her children with filmmaker husband Bart Freundlich.

"I actually watched a live birth," Moore said. "Someone let me watch her give birth!"

"Did you know the person?" Kimmel asked.

"Not well, no," Moore replied. "She was so nice. The production found her and she agreed to talk to me about being pregnant and what it was like. And then when she went into labor, they called me and I was there with her husband."

"I learned," she added. "I was there to learn, man."

Moore said she and the new mother kept in touch for a while after filming, though she did not keep in touch with the baby. "The baby would be like, 'What the hell? I had no idea you were there!'" she quipped. "That was an unusual experience."

The actress starred opposite Hugh Grant, a playboy crippled by a fear of commitment after he learns his girlfriend (Moore) is pregnant, in the rom-com. The late Robin Williams played Moore's onscreen bumbling obstetrician.

<p>Everett Collection</p> Julianne Moore and Hugh Grant in 'Nine Months'

Everett Collection

Julianne Moore and Hugh Grant in 'Nine Months'

Moore's anecdote came after she shared some of her research for her newest film May December (in select theaters Nov. 17). The Todd Haynes drama stars Moore as a woman named Gracie who has a scandalous affair with a 13-year-old boy, Joe (Charles Melton). Twenty years after she went to prison for the romance that rocked gossip pages, Gracie and Joe have married and built a life together, sharing three children. But when a Hollywood actress, played by Natalie Portman, meets them to do a film about their past, the couple buckles under pressure.

"My character is a baker so I had to go to a bakery and talk about baking with someone and watch her bake a cake," Moore told Kimmel. "I also arrange flowers so I went to a florist. So I'm observing someone to play someone who's being observed by someone who's going to play me."

"Very meta," Kimmel quipped.

Watch Moore's interview in full above.

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