The actors star together on The Big Bang Theory and dated back in the day, but are just friends now. Kaley recently shot down reports that they are dating following her divorce.
“So sorry to disappoint , but no home wreckers or secret flings going on here. Me and @sanctionedjohnnygalecki are just the best of buds- Leonard and Penny will just have to suffice!!! 💗💗❤️❤️,” Kaley wrote on Instagram.