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Charlotte Sullivan, 'Rookie Blue'
You know her as: Officer Gail Peck / Why we like her: It takes an actress truly dedicated to her role to pull off someone as hard to like as Officer Gail Peck sometimes is. Sullivan's ferocious, unyielding commitment to her character is worth admiring. / Where else you've seen her: Marilyn Monroe in "The Kennedys," Mandy in "M.V.P" and Lacey on "Blue Bloods."