The celebrity spinner has been tapped to get the VIP crowd primed for Oscar winner Julia Roberts and the Dave Matthews Band, who will be taking the stage Sept. 10 at Madison Square Garden as part of the Stand Up for a Cure's 2008 concert series.

The charity, which raises money for lung cancer research and treatment, confirmed Wednesday that Ronson would be deejaying the preshow party and Roberts has signed on to host the event.

"We are thrilled at the range of artists who have opted to shine a light on the need for funding and awareness this year," Stand Up for a Cure founder and executive producer Jordan Belkin said.

And these were obvious choices all around: Roberts will be there to give the cause a world-class face, and no one knows more about finding a glimmer of hope where none existed before than Ronson.