Tyrel Jackson Williams (born March 16, 1997) is an American actor, singer and musician. He currently stars as Leo Dooley in the Disney XD series, Lab Rats. Williams was previously seen in Everybody Hates Chris, as a younger version of Chris, played by his older brother, Tyler James Williams. He appeared in the episodes, "Everybody Hates Greg" and "Everybody Hates Driving". He also appeared in the movie Failure to Launch when he was young.