Zap2it.com says Grant finds his own dancing so repulsive, he has pledged never to dance again.
According to London's Channel 4, Grant so dreaded a scene in which he frolics in his underwear he didn't want to watch it after filming.
Said the actor: "I dreaded it and dreaded it and tried every way I could to get the scene cut, but to no avail. I went and played it back. And I promise you that from that moment to the end of my life, I will never dance again."
NBC reportedly holds celebs hostage to Jimmy Fallon's show
Boston schools pull out free condoms over wrapping complaints