The star and her husband, Josh Smith, are expecting a baby girl on Peck's 37th birthday (14Sep15), and they have already decided to name the kid Ava Jolie.

The mum-to-be broke the news to and shared photos of her growing baby belly, in addition to an image of her ultrasound.

Peck and Smith, a production assistant on U2's current tour, wed last year (14).