Ian David Lithgow (born February 3, 1972) is an American actor and therapist.
in clinical psychology, specializing in marriage and family therapy, at Antioch University Los Angeles, graduating in 2005.
He originated the role of Tony in Boy Gets Girl, which he performed at the Manhattan Theatre Club.
[citation needed] In the 1990s NBC sitcom 3rd Rock from the Sun, Lithgow portrayed the recurring role of Leon, a purportedly dim-witted student who attends the physics class of Dick Solomon (portrayed by Ian's real-life father John Lithgow).
Ian portrayed a son of John's character in the 2020 HBO television series Perry Mason.