Of course, it would have to be "Mork from Ork"... so he could communicate with them and tell them to send me back! Remember Robin Williams as "Mork From Ork?" Yep, he would tell them that I have places to go, things to do, so let me leave Mars! The sooner the better!!
The thought of being trapped with any celebrity is repulsive to me. It is just a personal observation that I have but most celebrities are self centered and nasty people that I wouldn't care to be with. I would be happy being trapped with my best friend in life; my wife.