TV Character Ch-Ch-Ch-Changes 

If there was anyone who should have been taking sage elder advice from Mr. Feeney, it wasn't Cory — it was his brother Eric (Will Friedle). Over the course of seven seasons, the floppy-haired dreamboat older brother somehow went from a cool underachiever to what could only be medically described as completely brain dead. 

The latter day fast-talking, Ryan-crushing, well-meaning airhead Kelly Kapoor would be horrified to meet the dowdy and flavorless Kelly Kapoor of Season 1. Or, at the very least, take her to the mall. Kelly evolved from demure office drone to a more Mindy Kaling-esque gal to the full-on Valley Girl we've come to know and love (mainly for teaching us how to use our Netflix queue). 

Forget First and Second Becky, the biggest character change on 'Roseanne' was Becky(s)'s husband Mark (played by the late Glenn Quinn, pictured here with Second Becky Sarah Chalke). Mark started out as the rebellious bad boy whom you always feared your daughter would bring home (a nightmare come true for the Conners) and wound up being the very dim-witted boy you always feared your daughter would marry. 

Texan Tyra (Adrianne Palicki) started off as one of the most unlikable characters on 'Friday Night Lights'. The bratty town teen sexpot seemed like nothing but trouble, but there was eventually more to the beautiful blonde than met the eye. She turned from a vixen to an ambitious go-getter who wrote what can only be described as the greatest college entry letter of all-time. New Tyra would have only been truly great, however, if she'd picked poor Landry. 

You could argue that all of the characters on 'Friends' became altered throughout the nine seasons of the wildly popular sitcom (Joey got dumber, Monica got more uptight) but no one more so than Ross (played by David Schwimmer). In the first season (which won Schwimmer an Emmy) Ross was a smart, nebbishy, neurotic New Yorker right out of a Woody Allen movie, but as time went on he turned into a high-pitched, over-the-top goober. Still, without "new" Ross there are no leather pants, "pivot" or "U

What would a nice New York gal be doing hanging around the likes of Jerry, Kramer, and George? When Elaine (Louis-Dreyfus) was first introduced on 'Seinfeld' she was the odd (wo)man out and was a woman the Elaine we came to know and love would likely hate and/or alienate. Soon, Elaine transformed into the cynical New York gal she was meant to be all along. 

When Miranda (Cynthia Nixon) first met bartender Steve (David Eigenberg), he was a rare find: smart, sexy, and sensitive. Over the course of the show and the movies, though, Steve went from reading classic literature to watching 'Scooby-Doo,' and from being "the one" to being the guy that would (unbelievably) cheat on Miranda and force them into couples' counseling. By the time 'Sex and the City 2' rolled around, Steve had mostly returned to form, but the damage had already been done. 

It's hard to imagine anyone on the delightfully depraved 'It's Always Sunny in Philadelphia' as a voice of reason, but before she was getting addicted to crack and exploiting the welfare system, very early on Sweet Dee (Kaitlin Olson) actually seemed kinda sweet. Well, at least in comparison to her Paddy's Pub cohorts. But it didn't take long for them to rub off on her and for the giant bird known as Sweet Dee to become just as sick and twisted as the rest of the gang. We wouldn't have it any ot

At the start of 'Buffy,' Wesley-Wydam Pryce (Alexis Denisof) seemed cowardly, at best. After getting fired from the Watchers' Council, Wesley stepped up his game and by the time he got to 'Angel,' he was ballsier and much more confident. Of course, poor Wesley had plenty of ups and downs throughout both series, making him an ever-evolving and changing, albeit beloved, character.