David Lee Gallagher (born February 9, 1985) is an American actor. He began his career as a and when he was two years old and is best known for his role as Simon Camden on the television series "7th Heaven". He is also known for his feature film roles; as Mikey Ubriacco in "", as Kevin Harper in "" and as in "". During his career as a child and teen star, he was nominated for five Young Artist Awards and won a Teen Choice Award. He is also known for voicing the character Riku in the "Kingdom Hearts" video game series.