Mother is an improvisational comedy group formed in 1999 . Its nine members are Scot Armstrong, Tara Copeland, Jon Daly, James Eason, Jesse Falcon, Jason Mantzoukas, Doug Moe, Jessica St. Clair, and Christine Walters. They performed regularly to sold-out houses at the Upright Citizens Brigade Theatre in New York City from their inception until September 27, 2008. .
With the assistance of Armando Diaz, they created a new longform, The Sleep Over in the summer of 2001. They performed it for over two years at the UCBT. They later developed The Soundtrack with the assistance of Kurt Braunholer. The Soundtrack ran at the UCBT from 2003-2008. They performed both forms at the Chicago Improv Fest on three occasions. In 2005, Mother won the Chicago Improv Festival Super Cage Match Championship, becoming the first New York City team to do so. This garnered the attention of Malcolm Gladwell, who profiled them in his book Blink (2005). <ref>Gladwell, Malcolm. Blink. pg 44.</ref>
Despite being "retired" from Cagematch, a competitive UCBT improv show, since 2005, Mother holds the records for All-Time Vote Leader (2678) and Most All-Time Wins (49) in the Upright Citizens Brigade Theatre's Cagematch.