What Makes Dwayne Johnson and Nick Jonas Sexy? Karen Gillan Reveals All About Her 'Jumanji: Welcome to the Jungle' Costars

Karen Gillan sits down with PEOPLE Now to discuss her co-stars sexiest traits, like Nick Jonas' epic dance moves and Dwayne Johnson's optimism

If there ever happened to be an award for “Sexiest Cast Alive,” the stars of Jumanji: Welcome to the Jungle would be the first contenders, according to Karen Gillan.

The Guardians of the Galaxy star sat down with PEOPLE Now to chat about the most alluring qualities about each of her costars in the Jumanji reboot, which hits theaters Dec. 20.

Having worked with PEOPLE’s 2016 Sexiest Man Alive, Dwayne “The Rock” Johnson, pre- and post-cover release, Gillan says the most appealing quality about the Fast and Furious star “other than the physical because he works very hard to maintain that body would probably be his optimism and his belief in other people.”

Eric Charbonneau/Invision for Sony Pictures/AP

As for working with two of Hollywood’s biggest comedic stars, Kevin Hart and Jack Black, Gillan says there surely wasn’t a dull moment on set.

“He’s incredibly funny and that’s always a sexy quality,” she says about Hart, adding that Black, too, is “incredibly funny, but so talented at music. He’s got the guitar and the singing thing going on.”

A genuine Jonas Brothers fan since day one, Gillan says the sexiest thing about Nick Jonas is getting to see his showstopping dance moves in person.

“I really like his pop music,” she continues. “I think it’s some of the best out there.”