Johnny Galecki and girlfriend Alaina Meyer split, the Big Bang Theory alum celebrated his ex’s birthday.“The happiest 74th birthday to my fake wife @kaleycuoco You know how much I adore you and respect you,” Galecki, 45, posted via Instagram on Monday, November 30, sharing multiple photos of him and Kaley Cuoco through the years. “I’m so proud of all you are doing and so happy with your happiness.