The Contraband actor's spokesperson confirmed to The Huffington Post that he tied the knot with the British supermodel in Los Angeles over the weekend.
The couple were not widely known to be dating.
Marriage rumors first emerged when a Crown City News reporter spotted the couple "passionately kissing" while waiting in line at the Los Angeles County Registrar's office.
Deyn claimed in March that she was "all alone" and not dating anyone.
"There has been no man in my life for several months now and although it would be nice to have a boyfriend, I can't just settle for anybody," she said at the time.
Last month, she signed on for Terence Davies's new film Sunset Song opposite Peter Mullan.
> Giovanni Ribisi: 'Kate Beckinsale fight in Contraband scarred me'
Watch the trailer for Giovanni Ribisi's upcoming film Ted below: