William Desmond Anthony Pertwee, MBE (21 July 1926 – 27 May 2013) was an English actor and comedian.

The family moved home many times during Pertwee's childhood and he lived in Hereford, Glasbury, Colnbrook, Newbury, Erith, Belvedere, Blackheath, Storrington, Westcliff-on-Sea, Wilmington and Worthing.

Pertwee left school during the Second World War and worked for a company that made parts for Spitfire cannon.

He later worked as an accounts clerk at the Stock Exchange and as a salesman for the clothing retailer Burberry in London.

In July 2008 he and other surviving members of the Dad's Army cast gathered together at the Imperial War Museum on the 40th anniversary of the show's first broadcast in 1968.

In 2011 a portrait of Pertwee, painted by a local artist, was unveiled in the Dad's Army Museum, Thetford where it now resides.

His death, and those of Pamela Cundell in 2015 and Frank Williams in 2022, left Ian Lavender (who died in 2024), who played Private Pike, as the only surviving Dad's Army cast member.

Pertwee's brother James Raymond "Jiggy" Pertwee was an RAF Whitley Bomber pilot who was killed in a crash on a hillside close to a disused quarry above Bank Foot, near Ingleby Greenhow in North Yorkshire, following a leaflet drop over Dortmund, Germany, in June 1941.