Jackass star Johnny Knoxville was behind the big-budget stunt which forced pal Luke Wilson to change his phone number. The Wedding Crashers actor was shocked when details of his direct cellphone were displayed on a banner flying on a plane above the Polaroid Beach House in Malibu, California at the Boost Mobile party on Saturday (21Jul07). Jackass star Knoxville played the prank on Wilson, organising the banner which read, "Luke Wilson's phone number 3105000082" - the actor's real number. Wilson's much-publicised phone number is no longer in service.