It’s not that easy being green — unless you’re Jennifer Aniston.

The gorgeous A-list actress was snapped looking sexy as ever in a green bikini on the shores of Mexico on Thursday.

PHOTO: Jennifer Aniston Vacations In Mexico

The stylish 40-year-old Friends alum soaked up some rays, and then covered up (drats!) in a sheer white dress and left the lush area.

Her upcoming film, The Baster, hits theaters in 2010.