Love Me, Love My PetDo you promise to love, honor and obey...my dog? When celebs like Mariah, Jessica and Ashlee fell in love, their pets came along for the ride.

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T.R. KNIGHT & MARK CORNELSON

Grey's Anatomy star T.R. Knight (with mixed-breed pup Ebony) and boyfriend Mark Cornelson know that relationships mean compromise, so they make walking two dogs together a joint activity – one leash for each!