The Sleepy Hollow actress let the big news slip during the launch of her new Makeup Forever launch in Los Angeles on Friday (01Feb13).
The actress met her cameraman husband-to-be on the set of doomed TV drama Pan Am at the beginning of 2012 and they have been inseparable ever since.
Confirming the news on Friday when a keen-eyed fan spotted a ring on her wedding finger and asked the million-dollar question, Ricci replied, "We got engaged a couple months back."
The actress was previously engaged to Owen Benjamin in 2009.