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Was a cast member of: Weeds
Now headlining: Animal Practice, premiered Sept. 26

There's nothing illegal going on here for Kirk, whose turn as NBC's animal-loving veterinarian Dr. George Coleman is quite a departure from his comedic tenure on Showtime's marijuana-fueled comedy. In his new gig, Kirk shares the spotlight with The Hangover's Crystal the monkey, who rakes in $12,000 an episode.