Murin, who starred on Broadway in Lysistrata Jones, tweeted an announcement Dec. 19 (although the engagement news was buried in her hashtag). She later tweeted her first "engagement photo" with Donnell.

You guys, I have some big news to share!! Ready??? I didn't hate the Annie movie at all. I actually liked it. #alsoigotengaged

— Patti Murin (@PattiMurin) December 19, 2014

Proud to unveil the official engagement photo! @colindonnell #milo pic.twitter.com/0XMqhynMcs

— Patti Murin (@PattiMurin) December 21, 2014

The couple issued a statement to Playbill.com that reads, "We are so thrilled and overwhelmed by all of the love and congratulations that have come from far and wide! Colin can't wait to watch every single 'Bachelor'-related TV program till death do us part, and Patti is especially excited to find out which workout program Colin is using when he is 80. Milo is just happy that his parents are finally making him an honest pup."

The couple met in 2007 and started dating last summer while performing in the outdoor production of Alex Timbers and Michael Friedman's musical adaptation of the Bard's comedy Love's Labour's Lost. The two share an apartment on the Upper West Side with their rescue pup, Milo.

Donnell starred in Roundabout's Broadway revival of Violet, and Murin was seen in Fly By Night at Playwrights Horizons.

Read more about their relationship in the Playbill.com column A Fine Showmance.