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Jessica Paré Welcomes Baby Boy With Boyfriend John Kastner: See First Photo

John Kastner and Jessica Pare
Mad Men star Jessica Paré has welcomed her first child with boyfriend John Kastner -- see the first photo and find out his name!

Mad Men mommy! Jessica Paré has welcomed her first child with boyfriend John Kastner. The couple announced the news on Friday, Mar. 21.

Related: PHOTOS: Cutest celebrity baby announcements

"Please meet Blues Anthony Paré Kastner…" the proud dad wrote via Instagram. In a pic, the couple's little boy was bundled up in a blanket and held by Kastner's 8-year-old daughter Summer Lee, whom he shares with ex-wife Nicole de Boer. 

Related: PHOTOS: 2014's babies of the year

A photo posted by johnkastner (@johnkastner) on Mar 20, 2015 at 8:47pm PDT

Us Weekly broke news in October that the Mad Men actress, 34, was expecting her first child with the musician, who's also Canadian. Paré was the guest of honor at an L.A. baby shower in February.

"Jessica was super lovely and gracious and genuinely appreciative of the party," an insider told Us at the time. "She got to spend time just socializing and was glad to be spending time with her friends and family!"

Related: PHOTOS: Mad Men cast off-camera

Famous guests in attendance included Mad Men costar January Jones, show creator Matt Weiner, and executive producer Scott Hornbacher.

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