Sydney Lassick (July 23, 1922 - April 12, 2003) was an American actor. He is best known for portraying Charlie Cheswick in One Flew Over the Cuckoo's Nest (1975), Mr. Fromm in Carrie (1976), Ernest Keller in The Unseen (1980), Luke Gutchel in Alligator (1980) and Roscoe in Cool as Ice (1991).
Lassick voiced Straycatcher #2 in Tom and Jerry: The Movie.