See full bio » A graduate of Harvard University, Ian Lithgow is an award-winning actor who has performed in TV, film, and in regional theatres across the country including the Goodman Theatre, the American Repertory Theatre, the Williamstown Theatre Festival, the Ahmanson Theatre, and the Pasadena Playhouse. Ian recurred as Leon on NBC's 3rd Rock from the Sun, ... Born: February 3, 1972 in in Cambridge, Massachusetts, USA