EXCLUSIVE: Jennifer Lawrence Pretended to Be Nicholas Hoult in Epic Text Message Prank With 'X-Men' Co-Stars

Never change, J.Law.

If Jennifer Lawrence is nearby, don’t leave your phone lying around.

The X-Men: Apocalypse star admitted she pretended to be ex-boyfriend Nicholas Hoult in a hilarious text message prank while they were filming one of the franchise’s first movies.

RELATED: Jennifer Lawrence Reveals She Used to Yell at Ex Nicholas Hoult in Southern Accent

“I had Nick’s phone and we were in a group [text] message with [Michael] Fassbender, [James] McAvoy and Josh Helman, another actor in the movie,” the 25-year-old actress started to explain on The Graham Norton Show in ETonline's exclusive sneak peek.

“So I wrote this really serious and emotional text and was like, ‘Guys, this is super embarrassing’ -- and I knew how to kind of write like Nick,” she continued. “And I was like, ‘I know this sounds silly, this is really embarrassing but, have you guys ever, like -- god this is so embarrassing -- lactated from your nipples?”

Cue laughter.

“And all of them wrote back!” Lawrence said, laughing hysterically as she recalled the epic prank. “James was like, ‘Dude, that sounds really serious, like honestly, you should go to a doctor. You might have a hormone problem.’”

RELATED: Jennifer Lawrence's Favorite Headline About Herself Involves Pizza

She shared that Fassbender replied with the following: “I don’t see what this has to do with anything.” Watch the video above to see the hilarious segment.

During her appearance, Lawrence also dished on her embarrassing first meeting with Harrison Ford, where she approached his table snapping and dancing as they looked at her, completely stunned.

"I realized while I was dancing they have no idea who I am," she said. "So I just turned around and walked back. Dying."

Lawrence and McAvoy are the latest guests on The Graham Norton Show, which will air Thursday at 11:30 p.m. ET/PT on BBC America.

Ever wonder what it's like to hang out with Lawrence and her BFF, Amy Schumer, on a Saturday night? Watch the video to find out.