Vanessa Kirby Rodin Eckenroth/Getty Images for Disney Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment Vanessa Kirby couldn't have predicted that being fake pregnant in The Fantastic Four: First Steps was actually more difficult than her pregnancy in real life. The actress, who plays Sue Storm in the new superhero pic, is currently expecting her first child with her boyfriend, Paul Rabil. She recently made an appearance on Late Night with Seth Meyers, where she shared the difference between having a fake bump in the movie and her real one. After greeting her on the stage, host Seth Meyers quipped about her current bump, "Oh, my God, it's so cool that you stayed in character." Related Stories Movies Why Pedro Pascal Never Wants to Be Clean Shaven for a Role Again Unless It's "Completely Necessary" Movies 'The Fantastic Four: First Steps' Review: Pedro Pascal and Vanessa Kirby Lead Appealing New Crew to Break Marvel Property's Six-Decade Curse "I honestly think a lot of people think it's a stunt of some kind. It's just crazy timing," Kirby said of her real-life pregnancy. She then detailed how they created her on-screen pregnancy, adding, "Essentially, the fake belly is like a foam thing. When it's a foam, it feels very light and a bit silly. So I kept saying to Flick, who looks after my costume, 'I want more. It needs to be heavier.'" However, the actress quickly regretted that request. "So we would try all these different things and eventually she kind of put heavy rice packets in the belly and it got so heavy, [and] I got really bad backache," she recalled. Kirby's now several months into her real pregnancy and realized her fake bump in the movie was "nothing like this. This is ... way lighter. So, I gave myself backache for no reason at all." Meyers joked in response, "Maybe you're on to something, which is like before you get pregnant, do something worse." The actress added, "That's true." The Crown star also noted that after carrying the "heavy, heavy loads of rice" for a while, she eventually got to the point where she was like, "Should we take some of these out? Because I was going, 'Oh,' all the time." The Fantastic Four: First Steps, which hits theaters on Friday, also stars Pedro Pascal, Ebon Moss-Bachrach, Joseph Quinn, Ralph Ineson and Julia Garner. THR Newsletters Sign up for THR news straight to your inbox every day Subscribe Sign Up The Man Who Saves the World? Gabe Polsky's Wild New Doc 'The Man Who Saves the World?' Sets Unusual Rollout, Awards-Qualifying Run (Exclusive) Pete Davidson 'The Home' Review: Pete Davidson Headlines Intriguing but Uneven Nursing-Home Horror From 'The Purge' Creator William H. Macy Joel Edgerton, William H. Macy Confront a Rapidly Changing America in 'Train Dreams' Teaser Trailer Oscars The Family Feud Over An Iconic Oscar Stephen King Stephen King's 'Girl Who Loved Tom Gordon' Movie in the Works with JT Mollner, Lionsgate (Exclusive) Heat Vision Box Office: James Gunn's 'Superman' Is Not Flying as High Overseas The Man Who Saves the World? Gabe Polsky's Wild New Doc 'The Man Who Saves the World?' Sets Unusual Rollout, Awards-Qualifying Run (Exclusive) Pete Davidson 'The Home' Review: Pete Davidson Headlines Intriguing but Uneven Nursing-Home Horror From 'The Purge' Creator William H. Macy Joel Edgerton, William H. Macy Confront a Rapidly Changing America in 'Train Dreams' Teaser Trailer Oscars The Family Feud Over An Iconic Oscar Stephen King Stephen King's 'Girl Who Loved Tom Gordon' Movie in the Works with JT Mollner, Lionsgate (Exclusive) Heat Vision Box Office: James Gunn's 'Superman' Is Not Flying as High Overseas