Lena Heady, 'Terminator: The Sarah Connor Chronicles'

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TV’s Skinniest Stars

Lena Heady plays the bad-ass title character who fights off 'Terminators' to protect her son (and the world), but the rail-thin star looks like she could snap in half. (Photo: FOX)

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Shenae Grimes, '... Media outlets are in a tizzy over the tiny stars of The CW's new '90210.' US Weekly is reporting that Shenae Grimes, 18, is 5'3" and weighs just 90 pounds. A source says the producers "want the girls to gain weight." (Photo by Stephen Lovekin/Getty Images)
Jessica Stroup, ... 21-year-old Jessica Stroup, the other '90210' star criticized for her fragile frame, is 5'8" and is estimated to weigh 100-105 pounds. US Weekly's source says, "I've never seen Jessica or Shenae eat." (Photo by Frazer Harrison/Getty Images)
Holly Hunter, 'S... It isn't just the kids who are starving. Does somebody need to save Holly Hunter too? The 'Saving Grace' star is painfully thin. (Photo by Stephen Shugerman/Getty Images)
Karina Smirnoff,... Spending every day 'Dancing' has done her body good, but dance pro Karina Smirnoff is perhaps a bit too tiny. (Photo by Frazer Harrison/Getty Images)
Katie Holmes Katie Holmes is a long way from her baby-faced days on 'Dawson's Creek.' Since becoming Mrs. Cruise, the 'new' Katie has gone through quite a transformation. She aggressively dropped her baby weight--with advice from pal Posh Spice--after having daughter Suri. (Photo by Andrew H. Walker/Getty Images)
Victoria Beckham 'Skinny Spice' Victoria Beckham is a size '0' and is said to have a 23-inch waist. The media has speculated about her stick-thin figure for years, but Beckham claims she doesn't have an eating disorder--she just controls what she eats. Is there a difference? (Photo by Carlos Alvarez/Getty Images)
Mary-Kate Olsen The Olsen twins are a tiny twosome, but it was Mary-Kate whose emaciated appearance drew concern back in 2004, when the 18-year-old Olsen denied reports of drug abuse and entered treatment for an eating disorder. (Photo by Evan Agostini/Getty Images)
Nicole Richie Nicole Richie got down to about 90 pounds before she turned things around and got pregnant with daughter Harlow. But a year after baby, she's now looking very thin again. (Photo by Stephen Shugerman/Getty Images)
Sarah Jessica Pa... 'Sex and the City' star Sarah Jessica Parker rivals only Madonna for having the most scary, vein-popping, fat-free limbs. (Photo by Frazer Harrison/Getty Images)
Calista Flockhar... When 'Ally McBeal' was all the rage, Calista Flockhart dodged anorexia rumors at every turn. Years later, she finally admitted the stress and the hectic schedule led her to under-eating. She's still a wee little thing, but looks much healthier with Harrison Ford by her side. (Photo by Pascal Le Segretain/Getty Images)
Portia de Rossi,... Skinny was contagious on the 'Ally McBeal' set: Ellen's new missus Portia De Rossi battled anorexia...she dropped down to 82 pounds during her years on the show. (Photo by Neilson Barnard/Getty Images)
Lara Flyn Boyle,... Lara Flynn Boyle has battled anorexia rumors for years because of her skeletal frame. (Photo by Kevin Winter/Getty Images)
Kyra Sedgwick, '... Her character on 'The Closer' might have a food obsession, but star Kyra Sedgwick is super-skinny. (Photo by Stephen Shugerman/Getty Images)
Ellen Pompeo, 'G... 'Grey's Anatomy' star Ellen Pompeo is 5'7" and estimates she weighs 100 pounds, though she claims not to own a scale. (Photo by Jason Kempin/Getty Images)
Teri Hatcher, 'D... Teri Hatcher, 43, has slammed rumors of an eating disorder, but there's no denying the 'Desperate Housewives' star has gotten quite lean in recent years. (Photo by Vince Bucci/Getty Images)
Taylor Momsen, '... 'Gossip Girl's' 'Little J' Taylor Momsen has dropped significant weight in Season 2 of the addictive teen show. Momsen was hospitalized in October for a severe throat infection. (Photo by Andrew H. Walker/Getty Images)
Lena Heady, 'Ter... Lena Heady plays the bad-ass title character who fights off 'Terminators' to protect her son (and the world), but the rail-thin star looks like she could snap in half. (Photo: FOX)
America Ferrera,... America Ferrera has been celebrated for having curves and being a positive role model, but the 'Ugly Betty' star reportedly lost 20 pounds--and caught some flack for it. (Photo by Andrew H. Walker/Getty Images)
Tracey Gold, 'Gr... Tracey Gold is much healthier these days, but the 'Growing Pains' star entered treatment in 1992 after dropping to just 80 pounds. (Photo by Kevin Winter/Getty Images)
Jamie-Lynn Sigle... Jamie-Lynn Sigler, best known as 'The Sopranos's daughter Meadow, battled anorexia and exercise bulimia, and even wrote a book about it called, 'Wise Girl.' (Photo by Stephen Lovekin/Getty Images for IMG)