It's no secret that Galecki and Cuoco dated when Big Bang Theory
first started, but after the actress announced her split from husband, Ryan Sweeting
, a new crop of romance rumors spread
about the co-stars. "So sorry to disappoint, but no home wreckers or secret flings going on here," Cuoco responded via Instagram to the reports in January. "Me and @sanctionedjohnnygalecki are just the best of buds -- Leonard and Penny will just have to suffice!"