The Cougar Town star shared the happy news with fans on Instagram on Monday (31Oct16) as she and her husband, fellow writer/actor Rene Gube, celebrated Halloween.

Alongside a snap of the couple with its hands over Briga's bulging belly, she wrote, "Happy Halloween from the growing Gube family!! Next Halloween we will be covered in spit up and diapers... and we can't wait".

Heelan, who is also known for her work on TV comedy Undateable, wed The Office regular Gube last year (15).