Anthony Mackie: Why Scarlett Johansson Will Be a Great Mom

Anthony Mackie talks about the actress and what to expect from her.

April 3, 2014 -- Anthony Mackie is a newcomer to the Marvel universe: he plays an ally of Captain America, the Falcon, in the sequel "Captain America: The Winter Soldier," which opens Friday.

Mackie surely had fun teaming up with Chris Evans, a.k.a. Captain America, but he has especially high praise for the actress who plays the Black Widow in the film, Scarlett Johansson.

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"She is definitely one of the sweetest, coolest [people]," Mackie told ABC News Radio. "She has every right, because of her status, because of her looks, because of who she is to be a stark raving lunatic, and she's not," Mackie told ABC News. "She's one of the sweetest, coolest, down-to-earth girls you'll meet and just fun to be around."

Referring to the actress as a "sexapotamus," Mackie also gushed that Johansson, 29, who has not yet confirmed her pregnancy, will be "a great mom."

"She has a very soft sensitive side," he said.