Jack Riley (born December 30, 1935) is an American comedic actor probably most recognizable as the irascible Elliot Carlin from Bob Newhart's 1970s TV sitcom, The Bob Newhart Show, and as the voice of Stu Pickles in Rugrats and All Grown Up!.
Riley was born in Cleveland, Ohio, the son of Agnes C. (née Corrigan) and John A. Riley. After attending Saint Ignatius High School and John Carroll University, he served in the US Army. After being discharged, Riley became a popular radio personality in Cleveland. His friend Tim Conway helped him receive work in California writing comedy sketches, which later led to acting jobs.
Riley was one of the busiest 'bit players' on television in the 1970s and 80's. He also was a favorite of Mel Brooks, appearing in several of his films. Among his credits are multiple appearances on such shows as Barney Miller, Hogan's Heroes, Night Court, and single appearances on just about every top comedy on television. In 1973, he was cast as Gomez Addams in "The Addams Family Fun-House." In 1979, he starred in ABC's holiday telefilm The Halloween That Almost Wasn't (aka The Night Dracula Saved The World) as Warren the Werewolf (Wolf Man) of Budapest.
Recently, his voice can be heard in commercials for "Country Crock" margarine. He also voiced the character "PC Modem, the computer genius" in radio commercials for CompUSA that aired in the 1990s. He continues to make guest appearances in popular sitcoms, showing up in episodes of Seinfeld, Son of the Beach, Friends, Coach, The Drew Carey Show and That 70's Show in recent years.