No joke: Saturday Night Live's Fred Armisen is getting married.

He and Mad Men star Elisabeth Moss are engaged, her rep confirms to Usmagazine.com.

See photos of flashy celeb engagement rings.

"It happened just a few days ago," Moss, 26, first told usaweekend.com on Thursday. "It's private, so I don't want to share the details of how it happened, but I will say it was perfect."

See unforgettable celebrity wedding photos.

The two have been spotted together a lot recently. They hit a Vanity Fair party for Mad Men earlier this month at Hollywood's Chateau Marmont. The New York Post reported that they "canoodled in a corner."