His orthopedic surgeon recommended he learn card tricks as an alternative to occupational therapy and to get the dexterity back in his hands.

Soon he was performing for friends and family then eventually at birthday parties under the stage name "Justin Kredible" (a play on the words just incredible), a name given to him by his mother.

In Magic Meltdown, Willman performed tricks based on a chosen topic such as technology, children, and food.

[15] Willman began hosting Win, Lose or Draw on Disney Channel, a revival of the teen version of the Burt Reynolds and Bert Convy classic game show in 2014.

[16] In July, Comedy Central ordered a pilot for Sleight of Mouth, a weekly magic-based variety show hosted by Willman.

[23] In 2003, Willman had a brief role as a teacher’s assistant on the WB show Gilmore Girls: Season 4 Episode 3 "The Hobbit, the Sofa and Digger Stiles.” Willman has guest starred on the CBS show Defenders, and made a cameo on the Disney sitcom The Suite Life on Deck where he played Armando.