Miss Saigon has dominated this year's WhatsOnStage awards, winning nine trophies including best West End show.
The record haul follows the musical's return to the West End last year, 25 years after it premiered in London.
The awards, focusing predominantly on London theatre, are voted for entirely by members of the public.
The new production of Miss Saigon won nine of its 12 nominations, including best actor and actress in a musical, best direction, best choreography and best musical revival.
Set in 1975, Miss Saigon is a love story about the relationship between an American GI and a young Vietnamese woman.
The musical premiered at the Theatre Royal, Drury Lane, in 1989 and closed in 1999 after more than 4,000 performances. As well as record-breaking runs in London and Broadway, it has been performed in 28 countries, more than 300 cities and in 15 different languages with more than 35 million viewers worldwide.
Sir Cameron the show's producer reworked the show 10 years ago to enable it to play in more theatres.
"If anything the tragic love story of Miss Saigon has become even more relevant today. In the last 25 years our country has become involved in similar wars in Iraq and Afghanistan in the way we weren't in Vietnam and the American Dream has been buffeted by the reality of recent history," he said.
In all its history of productions under Cameron Miss Saigon has won more than 40 awards including two Olivier Awards and three Tony Awards prior to this record breaking achievement.
Former Doctor Who co-stars David Tennant and Billie Piper won best actor and best actress in a play. Tennant for Richard II and Piper for Great Britain. ?BBC