Congratulations are in order for Jessica Paré and singer boyfriend John Kastner, as the pair welcomed a bouncing baby boy!

The Mad Men star and Canadian musician made the announcement via Instagram with a photo showing the baby being cradled by his big sister, seven-year-old Summer Lee, John's daughter from a previous relationship. The post also revealed the little boy's unique name: Blues Anthony Paré Kastner.

jessica pare baby blues
Instagram

Jessica, 34, is best known for her role as Megan on the hit TV series, which she will be joining once again for the show's final season.

READ MORE: 'Mad Men' Star Jessica Paré is Pregnant!

The couple announced the pregnancy in equally adorable fashion last October, with a cuddly photo of the two standing behind Summer, who was wearing an “I’m going to be a big sister” T-shirt.