The Sex and the City: The Movie hunk was in agony after a sharp needle broke off in his left foot and he was told he'd have to go under the knife to remove it.
He visited a specialist surgeon in Las Vegas last week for the operation, which he filmed and posted on his Twitter.com page.
In the gory footage, the doctor can be seen slowly extracting the needle, while Marini declares, "I did not feel anything. The (anaesthetic) shots are painful, but let me tell you, I did not feel anything."
The French star later tweeted a photo of himself relaxing poolside in Monte Carlo, writing, "My foot somehow feels much better!"