Mark Linn-Baker (born June 17, 1954) is an American actor and director famous for his role as Larry Appleton on the television sitcom Perfect Strangers.
Mark Linn-Baker graduated from Wethersfield High School in Wethersfield, Connecticut in 1972. Graduating from Yale University with an MFA in Drama in 1979, Linn-Baker found most of his early roles on stage. He appeared in the 1983 Broadway version of the Doonesbury comic strip. He appeared in Laughter on the 23rd Floor in 1993, the 1996 revival of A Funny Thing Happened on the Way to the Forum, the 1998 Roundabout Theatre Company production of A Flea in Her Ear, the 2003 musical A Year With Frog and Toad, and the 2006 comedy Losing Louie.
Linn-Baker's first movie role was a small part in Woody Allen's 1979 film Manhattan. Unfortunately for the young actor, most of his scenes were later cut from the film. Three years later, he would land a far more memorable film role as Benjy Stone in the 1982 comedy film, My Favorite Year, co-starring with Peter O'Toole. In a manner similar to his future role in Perfect Strangers, Linn-Baker played the straight man to O'Toole's outrageous character, Alan Swann.