Jack Carroll competed in the 2013 series of Britain's Got Talent at the age of 14, finishing as the runner-up to silhouette dance troupe Attraction.
In 2010 aged just 12, Jack Carroll came to comedian Jason Manford's attention when he saw a video of Jack performing at his parents' wedding anniversary. At Jason Manford's invitation, Jack gave a short performance at the start of Jason Manford's live show in front of more than 1,400 people at St. George's Hall in Bradford. The performance was featured on a segment of BBC One TV series The One Show. He also performed with Jason Manford again in June 2013 at the Victoria Theatre in Halifax.
Jack, who suffers from cerebral palsy, often uses his disability as a vehicle for many of the routines and gags in his act, and has been praised for not letting the condition affect his aspirations and goal of being a professional comedian.
In 2012, Jack Carroll was cast as Mr. Frazernagle in Ministry of Curious Stuff on the CBBC Channel, which starred fellow comedian Vic Reeves, and has appeared in two series of the show. He won a Daily Mirror Pride of Britain Award in 2012 for the "Teenager of Courage" category.