In the four-part show, archival footage and personal videos and photos are intertwined with present-day interviews and scenes of the group embarking on their 2022 tour
"Gossip Girl" actress Lively's website, Preserve, featured a post on family, congratulating "all the expecting mothers out there," accompanied by a photo of Lively caressing her bump.
Lively, 27, and "Van Wilder" actor Reynolds, 37, worked together on the set of 2011's "Green Lantern" movie.
They were married in September 2012. This is the first child for both.
Reynolds was previously married to actress Scarlett Johansson.