Mad Men's Jessica Paré is pregnant

Mrs. Draper is having a baby!

Yes, Mad Men's Jessica Paré, 33, is pregnant. The Canadian actress is expecting her first child with boyfriend John Kastner, a Canadian musician.

Read more: Celebrity parents: Baby before marriage>

This is the first child for Jessica but the second for John, who actually announced the news a month ago in an Instagram photo featuring his seven-year-old daughter, Summer Lee, beaming in a cute tee with the words, "I'm going to be a big sister."

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Jessica's been on Mad Men since 2010, but she rose to star status on the show at the end of season 4, when her character, Megan Draper, married Jon Hamm's, Don Draper. (Did I get that right? I don't watch the show—ahhhh, sorry.)

She recently commented on the show ending in spring 2015. "I do feel like the end of Mad Men is sort of a coming of age," she told Elle Magazine at an event in NYC. "There was before Mad Men, and there's after, and that's what we're talking about here tonight in terms of the milestone moments in a woman's life. We're moving and and we're growing."

Off to update our Who's Pregnant in Hollywood gallery. See you there!

Love! xo Haley-O Celebrity Candy: Follow along as Haley Overland delivers the latest scoop on celebrity families—plus sweet celeb interviews! You can’t have too much of this candy, so check back often.