Jack Frost is the spirit of winter and the main protagonist of Pooh's Adventures of Rise of the Guardians. Jack Frost is a teenage hellion who enjoys creating mischief and has no interest in being bound by rules or obligations; he just wants to spread his winter magic for the sake of fun, but also wants to be believed in. Before Jack Frost became the next Guardian, he performed a selfless act of heroism by saving his sister from falling through thin ice. At the end of the film, Jack becomes the Guardian of Fun.
- He is voiced by Chris Pine.
- Jack will meet Littlefoot and his friends in Littlefoot's Adventures of Rise of the Guardians.
- Jack will meet Bloom and her friends in Bloom's Adventures of Rise of the Guardians.
- Jack will meet the Peanuts Gang and their friends in Charlie Brown and Snoopy's Adventures of Rise of the Guardians.
- Jack will join Barney in Barney Gets Frozen by the Snow Queen.
- Jack bonds well with Elsa the Snow Queen, since they both have magic winter-related powers, but they have a brother-sister relationship. He will become Toralei Stripe's boyfriend in the nearby future.
- Jack will meet Sonic in Sonic the Hedgehog and the Rise of the Guardians