"We were set up on a blind date by my manager," she told Us Weekly.
Kane, 22, says she's been admiring Colletti, 25, since his reality show days on MTV's Laguna Beach.
Kane's Dancing partner Mark Ballas is also a fan of her new man. He recently told Access Hollywood, "He's a great guy. I've met him, he comes to the show and he's very supportive of Chelsea, which is cool."