This romantic comedy, previously titled Blended, centers on a couple whose bad blind date lands them at a family resort with their children.
The Bridesmaids actress will star opposite Goldie Hawn in HBO's comedy pilot.
Kristen Wiig, Maya Rudolph, Rose Byrne and the rest of the girls will appear together on stage.
The comedy is set in New York's Hamptons, and surrounds two couples testing the 10 rules of a healthy open relationship.
Watch these side-splitting outtakes including sex scenes between Kristen Wiig and Jon Hamm, a dinner scene, and much more.
Kristen Wiig, Maya Rudolph, Melissa McCarthy, Rose Byrne, Ellie Kemper, and Wendi McLendon-Covey star in this comedy about an unruly group of bridesmaids.
Kristin Wiig, Maya Rudolph, Rose Byrne, Melissa McCarthy, Wendi McClendon-Covey, and Ellie Kemper's characters are all featured in these new one-sheet images.