Jennifer Lawrence Details Anxiety Over Filming Sex Scene With Chris Pratt: 'It's the Most Vulnerable I've Been

The actress says she felt nervous and guilty while getting intimate onscreen.

Jennifer Lawrence is opening up about her sex life -- onscreen, that is!

In a new interview with The Hollywood Reporter, the 25-year-old actress gets candid while speaking about the highly-anticipated sex scene she filmed with Chris Pratt in Atlanta, Georgia, for their upcoming sci-fi romance, Passengers.

"I had my first real sex scene a couple weeks ago [while shooting Passengers with Pratt], and it was really bizarre," Lawrence reveals in the interview. "It was really weird."

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In the Sony film -- which tells the tale of a group of interstellar space travelers who are put in cryogenic sleep for a long voyage across the stars -- Pratt stars as Jim Preston, a passenger who wakes up decades early after the spacecraft suffers a malfunction. Jim sparks up romance when, after coming to the realization he could live forever alone, he decides to wake up another passenger, Aurora (Lawrence), out of a desperate need for companionship. The result? The start of a beautiful love story.

Cate Blanchett, who was also participating in the roundtable interview, asks Lawrence if by "real" sex she means there was penetration involved. Lawrence quickly chimes in, laughing while saying, "No, no. Thank you for clarifying. It was weird. And everything was done right; nobody did anything wrong. It's just a bizarre experience."

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The actress, who also stars as Katniss Everdeen in The Hunger Games: Mockingjay – Part 2, explains that she relied on both alcohol and her mother to help her prepare and deal with the awkward on-screen encounter with Pratt. Lawrence notes that she felt "guilt" knowing that her 36-year-old co-star was a married man (he tied the knot with actress Anna Faris in 2009, and they have a 3-year-old son, Jack, together).

"I got really, really drunk," she admits. "But then that led to more anxiety when I got home because I was like, 'What have I done? I don't know.' And he was married. And it was going to be my first time kissing a married man, and guilt is the worst feeling in your stomach."

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"And I knew it was my job, but I couldn't tell my stomach that," she continues. "So I called my mom, and I was like, 'Will you just tell me it's OK?' It was just very vulnerable. And you don't know what's too much. You want to do it real, you want everything to be real, but then … That was the most vulnerable I've ever been."

While this is the first time Lawrence has starred opposite of Pratt onscreen, one person she does feel comfortable with is her frequent co-star Bradley Cooper. Last month, Cooper appeared on Howard Stern's Sirius XM radio show where he revealed he would "never" sleep with Lawrence. Watch the video below to hear more from the tell-all interview.