David Lee Gallagher (born February 9, 1985) is an American actor. Beginning a prolific career as a child actor and model at the age of two, Gallagher is a five-time Young Artist Award nominee and Teen Choice Award winner, best known for his role as Simon Camden on the long-running television series 7th Heaven, as well as for his feature film roles; as Mikey Ubriacco in Look Who's Talking Now, as Kevin Harper in Angels in the Endzone and as Richie Rich in Richie Rich's Christmas Wish.