Leon George Thomas III is an American singer, songwriter, record producer, and actor. After early roles in Broadway and providing the singing voice of Tyrone on the Nick Jr. animated series The Backyardigans (2006–2008), he played Andre Harris on the Nickelodeon series Victorious (2010–2013), for which he received an NAACP Image Award nomination.

The Backyardigans is an CGI-animated musical children's television series created by Janice Burgess. The series was written and recorded at Nickelodeon Animation Studio. It centers on five anthropomorphic animal neighbors who imagine themselves on fantastic adventures in their backyard. Each episode is set to a different musical genre and features four songs, composed by Evan Lurie with lyrics by McPaul Smith. The Backyardigans' adventures span many different genres and settings. The show's writers took inspiration from action-adventure films, and many episodes are parodies of films.