The couple got engaged after Sweeting proposed to Cuoco Wednesday, reports showbizspy.com. They have been dating for just three months.
"It's only been three months but she knows Ryan is the one. When you know, you know," said a source.
The couple recently walked the red carpet together at the Primetime Emmy Awards here.
Prior to dating Sweeting, Cuoco briefly dated "Man of Steel" actor Henry Cavill.
--IANS (Posted on 27-09-2013)