Comedy legends Carl Reiner, Tim Conway, Steve Lawrence and Garry Marshall are set to guest star on an upcoming episode of Two And A Half Men, to be broadcast Thursday, Jan. 30 at 9:30/8:30c on CBS. In the episode, multi-millionaire Marty Pepper (Reiner) proposes to Evelyn (Holland Taylor). In advance of their upcoming nuptials, Walden (Ashton Kutcher) and Alan (Jon Cryer) throw Marty a bachelor party. Marshall, Conway and Lawrence play Marty's friends who help him celebrate his last days of bachelorhood. Will this marriage last? Will everyone make it through the bachelor party unscathed? Make your predictions in the comments below!