The actor passed away in Portugal on Wednesday (07Nov12) after suffering complications following an operation earlier this week (begs05Nov12), although further details about his surgery were available as WENN went to press.
Dunn began his screen career in the 1930s, but took a break from acting to serve in the British Army during World War Two.
He returned to the public eye in the 1950s with a role in popular comedy series The Tony Hancock Show, but it wasn't until 1968 that he really found fame after signing up to play Lance-Corporal Jack Jones in classic BBC sitcom Dad's Army.
He scored a chart hit in the U.K. with the release of the song Grandad, which reached number one on his 51st birthday in January, 1971, and later landed the lead in a slapstick kids' comedy, also called Grandad.
Dunn, the cousin of late EastEnders soap star Gretchen Franklin, retired after Grandad was cancelled in 1984 and returned to Portugal, where he had set up home with his wife, actress Priscilla Pughe-Morgan and their two daughters.
Actor Stephen Fry was one of the first celebrities to pay tribute to Dunn following news of his death, writing on his Twitter.com page: ""Saddened to hear of the death of Clive Dunn, the immortal Corporal Jones from Dad's Army. RIP"".