David Lee Gallagher (born February 9, 1985) is an American actor and former model. 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. He is best known for his role as Mikey Ubriacco in Look Who's Talking Now and Simon Camden on 7th Heaven. He was Kevin Harper in Angels in the Endzone and Richie Rich in Richie Rich's Christmas Wish. Gallagher is also well known for the voice of Riku in the Kingdom Hearts video game series.