Demi Moore and Ashton Kutcher have spoken about inviting Susan Boyle to sing at their wedding anniversary, according to reports.

The couple became fans of the Britain's Got Talent star after a fan sent a clip of Boyle performing via Twitter.

Moore then re-tweeted the YouTube clip, and is widely regarded as being influential in generating such widespread interest in the 48-year-old.

According to the Daily Mirror, Moore and Kutcher now want to invite Boyle to sing at their wedding anniversary this September in Hollywood.

"Demi joked to Ashton about booking Susan to sing for him. She wanted her to lift up her skirt and flash her knee, the way she did with Piers Morgan,” a source said.

"And Demi has teased Ashton that Susan would eat him alive. The idea is a cocktail party at home in Los Angeles, the highlight being Susan singing."

As Entertainmentwise reported earlier, Boyle is believed to have left The Priory yesterday, where she has been treated for exhaustion.

The Scottish singing sensation enterred the London clinic on Sunday after losing to dance act Diversity in the Britain's Got Talent final.

Susan Boyle's life story