Alan Mandell (born Albert Mandell; December 27, 1927) is a Canadian-American actor. He was born in Toronto, Ontario. He is known for playing Rabbi Marshak in the Coen Brothers' 2009 movie "A Serious Man" and as Ventril Dease in the Netflix 2019 original movie "Velvet Buzzsaw". On stage, he his known for his stage works of Samuel Beckett.