It will be welcome news to Zooey's sister, Bones actress Emily Deschanel, who is also currently pregnant with her second child and will surely be looking forward to playdates between the two.
Zooey Deschanel and Jacob Pechenik
The quirky actress has been dating Jacob since mid-2014, and the pair met on the set of film Rock The Kasbah, which Jacob has been producing.
They made their red carpet debut at the 2014 Emmy Awards, confirming speculation that the pair were dating just weeks after she split from screenwriter Jamie Linden. It was her first serious relationship following her 2011 divorce from Death Cab For Cutie frontman Ben Gibbons.
New Girl follows the life of an eccentric young woman living with three male flatmates in Los Angeles, and the current season 4 is due to end later in 2015. The show has yet to be picked up for a fifth season.