The former Gossip Girl star, who is expecting twins with talent agent Jaime Feld, took to on Monday (27Jul15) to post a photo of a medical machine showing a read-out of the babies' vital signs, adding the caption, "2 girls. In sync."

The post sparked speculation the little girls had arrived, but Zegers has now returned to the site to set the record straight, telling followers the babies are not due until next month (Aug15).

He writes, "Misleading Instagram I guess. Girls not here yet. Just a doctors appointment listening to heartbeats. Couple weeks to go."

The couple wed in August, 2013.