Not exactly mainstream, but a slight step above October Silk. Sylvester Stallone Adult: The Party At Kitty And Studs Mainstream: Rocky, The Expendables, Rambo, etc Sly probably has the most famous porn-to-mainstream record of anybody on this list, as hes not only one of the highest paid action stars ever, but also appeared in a seriously dirty movie. The original Party At Kitty And Studs supposedly included Stallone cranking out some money shots, but the footage was later cut and the film repackaged as Stallone became more popular. Robert Kerman Adult: Debbie Does Dallas, The Satisfiers Of Alpha Blue Mainstream: Cannibal Holocaust, Eaten Ali