John Krasinski on getting George Clooney, Ryan Reynolds to join 'IF'

John Krasinski, Blake Lively, Ryan Reynolds and George Clooney

Actor-filmmaker John Krasinski shared how he managed to get major stars to sign onto the project, IF. During his appearance on Jimmy Fallon's talk show, he shared, "I got to say, the most yeses of my career was on this movie and the fastest yeses because they all love the idea of imagination, going back to your childhood."

When discussing the ice cube, voiced by Bradley Cooper, Krasinski explained, "I don't know why, but when I created this guy, in my head, I was like, ‘He's from Philly, and he's a little bummed to be living in Arizona.'"

Fallon then pulled up a photo of Blake Lively's character, which Krasinski explained is "a cat who's getting over her fear of water, so she dresses like an octopus." He joked that he used "emotional blackmail" to get the Gossip Girl star to join the film, which also stars her husband, Ryan Reynolds. "She was so nice to jump on board."

In terms of one of the most remarkable guest stars on IF, Fallon was surprised to see George Clooney join in as the voice of the Spaceman.

"This is a sort of deep, deep-cut Easter egg," Krasinski joked, and added, "That's his character from Gravity in my head, that he's still just floating around."

The fantasy film's voice cast also includes Emily Blunt, Steve Carrell, Matt Damon, Jon Stewart, Phoebe Waller-Bridge, Louis Gossett Jr, Sebastian Maniscalco, Chris Meloni, Richard Jenkins, and Awkwafina. IF hits theatres on May 17.

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