Lumley -- leading a campaign for all Nepalese fighters in Britain's army to be allowed to settle here permanently -- has become a national treasure with her well-spoken but devastating critiques of Prime Minister Gordon Brown's unpopular government.
"Joanna Lumley for Prime Minister" was the headline in Friday's Daily Express, while a string of groups with titles like "Joanna Lumley Is My Hero" have sprung up on online social networking site Facebook.
Lumley, who was born in British-ruled Kashmir in 1946, is supporting the Gurkhas because her father was a British major in the 6th Gurkha Rifles during World War II. The 63-year-old actress has said he would have been "overwhelmed with shame and fury" at Britain's treatment of them.
Her new role is a long way from her career as one of Britain's best-loved actresses of the last 25 years, though.
After starting out as a model, one of Lumley's earliest appearances was a bit part in the 1969 James Bond film "On Her Majesty's Secret Service" w