(CBS News) "The Big Bang Theory" star Kaley Cuoco has some big news -- she's engaged.
Cuoco and Sweeting have reportedly been dating for three months. They made their first red carpet appearance together Sunday at the Primetime Emmy Awards.
"It's only been three months but she knows Ryan is the one," a source close to the actress told Us Weekly. "When you know, you know."
Before Sweeting, Cuoco briefly dated "Man of Steel" star Henry Cavill.