(Born Apr. 09, 1954) Dennis Quaid is an American actor. Known for his famous grin, Quaid was a versatile actor, performing in both comedic and dramatic roles. Quaid's acting career seemed to reach its peak in the mid-to-late 1980s, with starring roles in such films as Enemy Mine and Innerspace. He also achieved acclaim for his portrayal of Jerry Lee Lewis in Great Balls of Fire (1989).