Rumors swirled that Segel wouldn't return for the show's upcoming season, but even though he denied departure, we can't help but think that he has far outgrown the sitcom. NPH, too. [Photo Credit: CBS]
USA's spy hit hadn't even finished its first season when the female population — and a sizable chunk of the male species as well — took notice of Bomer. [Photo Credit: USA]
True, 'Mad Men' is perhaps just as famous as Hamm, but no one can deny the perennially-stubbly actor's meteoric rise from douchey ad man to mega A-lister. [Photo Credit: AMC]
It took one prom dress and a bedside cry for Katherine Heigl to skyrocket beyond Seattle Grace. Whether or not she's actually kept that fame is another story.[Photo Credit: ABC]
Is it even up for debate? Ari Gold has long been the only consistent reason to ever watch the HBO meta-Hollywood series, save for Turtle's hats. [Photo Credit: HBO]
Breakout characters are one thing, but Spade — who already had momentum going into the show after 'SNL' — was really the only reason anyone was watching. [Photo Credit: NBC]
The Siri-speakin' hipster was famous before her Fox sitcom, but became something of a mini-phenomenon once her quirky quirks were unquirked to the quirky public. Quirk it, girl. [Photo Credit: FOX]
Teri Hatcher, Marcia Cross and Felicity Huffman may have staged impressive comebacks on Wisteria Lane, but it was Longoria who became an overnight sensation that we couldn't look away from. [Photo Credit: ABC]
By the time That 70's Show was nearing the '80s, Kutcher had broken out as a nationally recognized funny man and MTV-demo heartthrob. [Photo Credit: FOX]
After 'The 40 Year Old Virgin' took off, 'The Office' became a must-watch... well, at least when Carell was still lurking around the premises. [Photo Credit: NBC]
