From Smoking Hot To Not So Much! Former Hunk Matthew Fox's Lost Looks!

With his deep-set wrinkles, yellowing teeth and salt-and-pepper stubble, TV hunk Matthew Fox was barely recognizable when he arrived on the set of Extra Monday, prompting concern about what's behind his dramatic make-under.

Once a heartthrob to millions of women who fell for his leading man good looks and the heroic characters he portrayed on Party Of Five and Lost, the disheveled 46-year-old looked more like a hard-on-his luck struggling actor than a Hollywood star.

Fox recently underwent a grueling workout regime to play a ripped Navy Seal in Brad Pitt's upcoming zombie apocalypse movie World War Z, and before that had to lose weight for his role as a serial killer in the thriller Alex Cross – and the back-to-back blockbusters appear to have really taken their toll on his body and his looks.

"I didn’t want to lose weight unhealthily, but I didn’t know how to do it any other way," Fox told the December 2012 issue of Men's Fitness. "I read somewhere that when Christian Bale was preparing for The Machinist he ate nothing but an apple a day for months. Just one apple. That can’t be good for you."

Recent troubles in Fox's personal life have not helped the married father-of-two grow old gracefully either.

As RadarOnline.com previously reported, in May 20012 he was arrested and charged for driving under the influence while heading to a fast food restaurant in Bend, Oregon, for a late night snack.

"I was terribly embarrassed by that and take full responsibility for it," Fox later confessed in a sit-down interview on the Ellen show. "I really own that and have done every single thing the state of Oregon requires for a first-time DUI offender.

"I have learned a ton. I did four weeks of alcohol informational training," he told DeGeneres.

Fox wasn't quite as apologetic for another humiliating scandal in August 2011, when he was accused of punching a female bus driver in the face during a late night out in Ohio.

"There is a woman in Cleveland who claims that I hit her," he told Ellen.

"It's difficult to be accused of something that you did not do. I've never hit a woman in my life. Never have, never will. That's not a part of who I am as a man and hold that very dear to how I define my character."

The We Are Marshall star claims he was "sucker punched in the face" by a man and retaliated. Prosecutors ultimately decided not to pursue criminal charges and a civil lawsuit was later resolved.