Fame, they say, is fleeting. One minute you're the hottest thing going and the next you're a has-been who never will be again. Nowhere is that more evident than in show business, where life as an A-lister can fade quicker than the time it takes to fast forward through the commercials on your DVR.

Just take a look at some of the actors and actresses who were huge stars while working on a wide range of TV series (without having to resort to any cool catchphrases): They earned (some) critical and (a lot of) commercial acclaim, only to eventually watch their stardom vanish. Fret not, though—they'll always have a place in our hearts, and maybe they'll even get the opportunity to become huge TV stars all over again!

Check out our list of hopeful TV comebacks, up top.