A star-studded audience turned out for Madonna's official debut on the West End stage where she is starring in David Williamson's play 'Up For Grabs'.

The US singer plays the role of Loren, a naïve arts dealer prepared to do anything to sell a Jackson Pollock canvas - including attempting to seduce prospective buyers.

Among celebrities at last night's opening performance were Madonna's husband Guy Ritchie, actor Jonny Lee Miller, director Peter Hall, fashion designer Stella McCartney and singer Sting.

Despite mixed reviews of Madonna's preview performances last week, she received a standing ovation last night.

This is her first stage role since David Mamet's 'Speed the Plow' in New York in 1988.

'Up for Grabs' will have a 10-week run in London.