Kaley Cuoco not only celebrated her 32nd birthday on Thursday, but her engagement to boyfriend Karl Cook. He shared a video on Instagram of the Big Bang Theory star crying tears of joys just minutes after he popped the question. "After nearly two years I finally got up the courage to ask her to marry me," Cook captioned the post. "This is the best night of my life and I think the video shows it is the best night for Kaley as well." In the clip, Cuoco holds up the ring on her finger and announces through tears, "We're engaged!" Cook jokingly responds, "You still haven't said yes yet." She then shouts, "Yes! I say yes! I say yes!" Cuoco later gushed about the engagement herself by posting the same video as Cook. "Still crying," she wrote. "Every part of this night has been perfection just like you @mrtankcook. I love you forever!"