Born in Brooklyn, New York, he lent his voice to Boba Fett in the original and 1997 theatrical versions of Star Wars: Episode V The Empire Strikes Back. His voice was replaced by the voice of Temuera Morrison (who portrayed Jango Fett and the clone troopers in Star Wars: Episode II Attack of the Clones) in the 2004 DVD version of the Episode V.
Wingreen is best known for his role as Harry Snowden on the classic television sitcom All in the Family and its spin-off series, Archie Bunker's Place. He played the character from 1977 until 1983.
Prior to this, Wingreen was a regular during the 1960-61 season of The Untouchables, playing Police Captain Dorsett. He performed in "A Stop at Willoughby" and "The Midnight Sun," two episodes of the original Twilight Zone series. He also appeared on the original Star Trek series, making him one of the few people involved with both Star Wars and Star Trek. Wingreen also had a recurring role as Judge Arthur Beaumont in the series Matlock, and has guest-starred in numerous other series, including Mission: Impossible, The Outer Limits, Bonanza, The Rockford Files, and The Fugitive. In 1979, he was also a part of the ensemble cast of the acclaimed TV mini-series Roots: The Next Generations.