The three sportsmen have accepted two-year deals to become the faces of the brand.
Beckham's £40m three-year deal with the FMCG brand expires in June, though according to his management team, a global deal is still a possibility. It is also understood that a US extension to the deal might be struck following his agreed transfer to LA Galaxy.
Gillette is planning a major campaign, created by BBDO, featuring the trio of stars. The ads are due to break in July.
Beckham signed a deal with Disney last week to promote its theme parks and resorts. He joins singer Beyonce Knowles, as a celebrity backer of the Disney brand.