O'Shea Jackson Jr. (born February 24, 1991), also known by the stage name OMG, is an American actor, rapper and songwriter. He is the oldest son of rapper and actor Ice Cube and, in his feature film debut, portrayed his father in the 2015 biopic Straight Outta Compton. He has two brothers, Darryl and Sharif, and a sister Kareema. His brother Darryl is also a rapper under the name Doughboy, which is the nickname of the character his father portrayed, Darin "Doughboy" Baker, in his first film Boy ...