Jack Riley, who played Elliot Carlin on "The Bob Newhart Show," died on Friday at the age of 80, TheWrap has learned.
Riley, a venerable character actor, began working in television back in the 1960's. He appeared in numerous hit shows, including "Gomer Pyle:USMC," "The Flying Nun," "I Dream of Jeannie" and "Hogan's Heroes," to name just a few.
His best known role came in 1972 when he was cast as the highly-neurotic Elliot Carlin on "The Bob Newhart Show." Riley appeared in over 50 episodes over the show's six-season run.
RELATED: JAck Riley through the years
Jack Riley through the years
Jack Riley through the years
DIFF'RENT STROKES -- 'The New Landlord' Episode 16 -- Pictured: (l-r) Conrad Bain as Philip Drummond, Jack Riley as Charles Sutton (Photo by NBC/NBCU Photo Bank via Getty Images)
GETTING TOGETHER - 'Breaking Up Is Hard to Do' - Aired on January 1, 1972. (Photo by ABC Photo Archives/ABC via Getty Images) JACK RILEY;PAUL MAZURSKY
LOS ANGELES - JUNE 27: THE BOB NEWHART SHOW , episode 'The Last TV Show'. (At left) Bob Newhart (as Bob Hartley) and Jack Riley (as Elliot Carlin). Image dated June 27, 1973. (Photo by CBS via Getty Images)
DIFF'RENT STROKES -- 'The Girls School' Episode 24 -- Pictured: (l-r) Molly Ringwald as Molly, Felice Schachter as Nancy, Jack Riley as Mr. Crocker (Photo by Ron Tom/NBC/NBCU Photo Bank via Getty Images)
THE LOVE BOAT - 'Only the Good Die Young / Honey Beats the Odds / The Light of Another Day' - Airdate: October 13, 1984. (Photo by ABC Photo Archives/ABC via Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 1232 -- Pictured: (l-r) Actor Jack Riley, professional basketball player Dennis Rodman, and comedian Ellen DeGeneres on September 25, 1997 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)
381117 07: From left to right, Patricia Ridgley, actor Jack Riley, his son Brian Riley, and Courtney Miller arrive at the premiere of Paramount's 'Rugrats in Paris - The Movie' November 5, 2000 at Mann's Chinese Theatre in Hollywood, CA. (Photo by Chris Weeks/Liaison)
LOS ANGELES - JUNE 1: Actor Jack Riley arrives at the premiere and after-party for 'Rugrats Go Wild' at the Cinerama Dome on June 1, 2003 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Jack Riley, Marcia Wallace and Peter Bonerz during 3rd Annual TV Land Awards - Red Carpet at Barker Hangar in Santa Monica, California, United States. (Photo by J. Shearer/WireImage)
Jack Riley during Bob Newhart In-Store Book Signing at Borders in Westwood, CA, United States. (Photo by Paul Redmond/WireImage)
He also enjoyed a robust film career, having appeared in numerous productions by comedy legend Mel Brooks. Riley had parts in Brooks' "Silent Movie," "High Anxiety," "History of the World: Part I," "Spaceballs" and "To Be or Not to Be."
Later in his career, Riley continued to find work on television, particularly in comedy. He made multiple appearances on the hit series "Night Court," as well as "Diff'rent Strokes" and "Seinfeld."
Riley was also known for voicing Stu Pickles on the popular Nickelodeon series "Rugrats." The show proved to be a major hit and helped launch Nick Toons in the early 1990s. Riley would stay with the show throughout its nearly 15-year run, also lending his voice to "Rugrats: All Growed Up" and "The Rugrats Movie."