From Wikipedia, the free encyclopedia. Leon Thomas III (born August 1, 1993) is an American actor, singer, songwriter, musician and dancer who plays the role of Andre on the Nickelodeon series Victorious. Thomas was born in Brooklyn, New York but moved to Los Angeles, California and currently resides there. At age 10 he made his Broadway debut in 2003 as Young Simba in the Broadway production of The Lion King. In 2004, he appeared as Jackie Thibodeaux in the original Broadway cast of Tony Kus ...