'Mad Men' Star Jessica Pare & Boyfriend John Kastner Pregnant With First Child

Mad Men star Jessica Pare will be expecting her first child with boyfriend and Canadian musician John Kastner.

According to PEOPLE, Kastner apparently broke the baby news last month via Instagram when he posted a photo of his daughter Summer Lee, 7, wearing a T-shirt reading, "I'm going to be a Big Sister." Although media outlets overlooked the Instagram surprise, we are happy for the couple and their new arrival!

Pare is a Canadian actress appearing in films like Wicker Park (2004) and Hot Tub Time Machine (2010). Currently Pare is co-starring on the AMC series Mad Men as Megan Draper, alongside Jon Hamm. Draper is a secretary at Sterling Cooper Draper Pryce and is an aspiring actress.

A photo posted by johnkastner (@johnkastner) on Sep 9, 2014 at 7:01pm PDT

The couple, which are both Canadians met in May 2012, they have both previously been married. Pare married writer and producer Joseph M. Smith in 2007. Kastner was married to actress Nicole DeBoer (The Dead Zone) in 1999 and have daughter Summer together.

The couple have kept quiet about their relationship since 2012, however they were most recently seen together at the Audi's Celebration of Emmys Week in L.A. this August.

As Mad Men comes to an end, Pare will have ample time to prep for mommy hood. Elle magazine asked the actress in March about her life after the show. "I'm still terrified! It's a big world and there's a lot of amazing things going on in television now, partially because of Matt and Mad Men. So hopefully I'll land on my feet."