By Katie Donbavand
Updated Jan 22, 2015 @ 12:44 pm
Chris Pratt
Credit: Kevin Winter/Getty Images

Guardians of the Galaxy star and Seattle Seahawks fan Chris Pratt has agreed to a bet with New England Patriots supporter Chris Evans, aka Captain America, for the upcoming Super Bowl.

The bet, which will benefit children's charities, came about over Twitter and involves the loser showing up in costume with the winning team's uniform.

Pratt is supporting the Seattle Children's Hospital while Evans is helping Christopher's Haven, an organization that provides support to families of children receiving cancer treatment.

You know the NFL is a big deal when Star-Lord and Captain America are getting involved.