Star of long-running crime drama Dalziel and Pascoe, Warren’s been a stalwart of TV drama since the 1970s. His credits also include Down to Earth, Bleak House and The Jewel in the Crown.
What's he been in?
Warren's career took off in the late 1960s and 1970s with parts in TV dramas Softly Softly, The Avengers, Callan, The Onedin Line, Tinker, Tailor, Soldier, Spy and the controversial Stanley Kubrick film A Clockwork Orange.
He continued to work regularly on TV throughout the 1980s, clocking up appearances in popular dramas such as Boon, Bergerac, The Manageress and Lovejoy.
Warren also appeared in 1987's Blackadder The Third, and as Oliver Cromwell in a special Comic Relief Blackadder episode in 1988.
His credits in the 1990s included Sleepers, in which he and Nigel Havers played under-cover Soviet Agents, A Respectable Trade, Giving Tongue, The Locksmith, and The Mystery of Men.
Warren firmly established himself on TV when he landed the lead role of Detective Superintendant Andy Dalziel in the BBC crime drama Dalziel and Pascoe. The series, based on the books of British writer Reginald Hill, has proved a big hit with viewers since it debuted in 1996.
Away from Dalziel and Pascoe, he starred in several series of Down to Earth, alongside Pauline Quirke.
He also appeared in the 2005 adaptation of the Dickens classic Bleak House as the impetuous and hearty Lawrence Boythorn.
In 2002, Warren starred in the film Arthur's Dyke, alongside Down to Earth co-star Pauline Quirke.
Did you know?
Warren’s worked as a consulting producer on Dalziel and Pascoe since 2000, and has directed several episodes.
He once admitted that despite having to put up with less than complimentary comments about his looks, he receives his fair share of saucy letters from admiring women. One even sent a picture of herself in the nude.
Warren claims to be nothing like his boozy on-screen character Dalziel. "The man's a chauvinist pig whose idea of a good night out is swilling back ten pints in the pub with his supper waiting for him and the little woman tucked up in bed with a welcoming smile," he told The Mirror newspaper in 1997.
"I like going to the pub but my wife goes with me, too. Blokes like Dalziel just see women as sex objects."
He's one of a number of high-profile actors who've submitted themselves for questioning on comedy chat show The Kumars at No.42.
Warren was born in Oldham, England, in 1947.
After leaving school at the age of 15, he joined the Manchester Evening News as a copy boy. He later moved onto amateur dramatics and performed at Huddersfield Rep and the Liverpool Playhouse, before taking up acting as a full-time professional.
He lives in Buckinghamshire with his second wife, Michelle.