Rumours that The Once Upon A Time star was pregnant first started when she stepped out on set covering her stomach with a bulky grey coat.
Ginnifer, who got engaged to Josh in October of this year, has made no secret of her desire to start a family.
"I'm 35, so I'm already thinking about that," she has previously said. "If it happened right now, I would absolutely have a baby."
"The only issue I have with aging is nothing to do with my career," added Ginnifer. "It's that I want to have a lot of kids before I'm physically unable to do so."
At the time of their engagement, a representative for the couple confirmed the news on their behalf.
"We are so thrilled to announce our engagement and can't wait to celebrate with our friends and family, including our second family at Once Upon A Time," said the announcement.
Having met on the set of the hit TV show, Josh and Ginnifer went public with their romance in March 2012.
"It hit me like a blinding light," Josh said, speaking about first seeing the future mother of his child. "I thought, 'I'm in trouble now.'
"It's definitely a plus that we get to spend so much time together. I think it adds something; it adds a different dynamic to the characters that we're playing that we can bring to it."