The Client List star announced in June that she is expecting her first child with co-star Brian Hallisay, describing the pregnancy as "wonderful".
Jennifer has been keeping her bump relatively under wraps since then, but we got a look at it on Saturday (13 July), when she wore a vintage Mickey Mouse T-shirt to the 'Mickey Through The Decades Collection' event in Los Angeles.
The 34-year-old looked radiant and happy as she posed for the cameras.
Jennifer began dating Brian on the set of their TV show The Client List, which stars Jennifer as a single mum who turns to unconventional methods to earn money to keep her family supported.
The couple had previously met and worked together on 2011 show Love Bites.
Shortly after the baby news was confirmed, it was also reported that Jennifer and Brian were celebrating more good news: an engagement. It's thought Brian popped the question while the couple was on holiday in Europe in May.
But while Jennifer should be basking in happiness right now, it seems a few people have been trying to spoil her special time, prompting the star to leave Twitter.
Jennifer, who has more than 600,000 followers, said on 3 July: "Unfortunately with all the negativity people choose to send on Twitter as well as threats to their own well being, I'm sad to say Twitter is no longer for me.
"I have enjoyed all the kindness and love that came my way, as well as support. But this break is needed. Life should be filled with positivity and holding each other up, not making threats and sending bad vibes. To those of you who made it a joy, thank you from the bottom of my heart"
Jennifer's not alone - more pregnant celebrities in pictures!
Copyright: Vimeo / Weiss Eubanks