Bill Murray sang with Bono at George Clooney's wedding

'Ghostbusters' actor Bill Murray reportedly teamed up with U2 frontman Bono to sing at George Clooney's wedding last month.

The unlikely pair joined forces with model-actress Karen Duffy at a post-wedding brunch during the four-day celebrations in Venice, Italy, and they serenaded Clooney and his new bride Amal Alamuddin with Cole Porter songs, according to New York Post.

"They sang Cole Porter songs with a eight-piece orchestra and called themselves 'The Venetian Blinds'," a source said.