Former The Sopranos star Jamie-Lynn Sigler was stunned to learn she was pregnant so soon into her romance with Cutter Dykstra, because the couple planned to take the relationship slowly.

The actress was first linked to the baseball player in early 2012, and she announced to her followers in January (13) that they had become engaged.

Just a month later (Feb13), Sigler revealed she is expecting their first child, and she has now confessed the baby news was a shock.

The actress tells website, "We definitely thought it was going to be a slow relationship process and possibly an engagement - I felt like it was coming - so the baby definitely threw us for a loop."

Sigler is due to give birth to a son in August (13), and she is thrilled that several of her famous friends - including Beverley Mitchell, Joanna Garcia Swisher and Jenna Dewan-Tatum - will also become new mothers this year (13).

She adds, "It's really cool to be able to go through this with all of them and I'm due last so... I can see what to do and what not to do."

Mitchell is the first of the group to become a mother - she welcomed daughter Kenzie on Thursday (28Mar13), while Swisher is set to give birth in May (13), followed by Dewan-Tatum the following month (Jun13).