The former Big Bang Theory costars, who dated off-screen during the show's early seasons, reunited in an advertisement for the Royal Kingdom mobile app. "Game Night with @sanctionedjohnnygalecki just leveled up thanks to @royalkingdom," Cuoco wrote the caption of her Instagram post sharing the ad. "This was so fun to shoot! Back together with my buddy JG," she added in a comment. 

"Game night with @kaleycuoco just got a serious upgrade thanks to @royalkingdom," Galecki wrote in his own post. "I couldn’t believe it when these folks reached out and asked me to vouch for Royal Kingdom because I can HONESTLY tell you I have played over TEN THOUSAND LEVELS of Royal Match and Royal Kingdom is just as amazing. P.S., I will never claim that anything is great unless I truly believe it to be. Give it a try!"

The ad sees Galecki waltz into Cuoco's house, where she has prepared a spread of board games and snacks — only for him to immediately shout out the mobile Royal Kingdom app and toss his costar's board games out of her window. "Those are my games!" Cuoco exclaims.

The former Big Bang Theory costars, who dated off-screen during the show's early seasons, reunited in an advertisement for the Royal Kingdom mobile app. "Game Night with @sanctionedjohnnygalecki just leveled up thanks to @royalkingdom," Cuoco wrote the caption of her Instagram post sharing the ad. "This was so fun to shoot! Back together with my buddy JG," she added in a comment. 

"Game night with @kaleycuoco just got a serious upgrade thanks to @royalkingdom," Galecki wrote in his own post. "I couldn’t believe it when these folks reached out and asked me to vouch for Royal Kingdom because I can HONESTLY tell you I have played over TEN THOUSAND LEVELS of Royal Match and Royal Kingdom is just as amazing. P.S., I will never claim that anything is great unless I truly believe it to be. Give it a try!"

The ad sees Galecki waltz into Cuoco's house, where she has prepared a spread of board games and snacks — only for him to immediately shout out the mobile Royal Kingdom app and toss his costar's board games out of her window. "Those are my games!" Cuoco exclaims.