It was not RG body but it was an artist named Michael Curtis
PW_AD
Inside info: it wasn't Richard Gere's body either. The art was done at least a year AFTER the film wrapped and neither actor was available for a photoshoot. Also...Gere's hair wasn't darkened...that was the headshot provided by the studio. One final tid-bit...the body double for the photoshoot was NOT the same model who did the 'walking legs' trailer as has been widely reported...mostly by the trailer-model herself.
The IMP
TRIVIA NOTE: This one had false advertising all over it. It's bad enough that they colored Richard Gere's hair (it's gray in the movie) but they also plopped Julia Roberts' head on another woman's body.