Rosario Dawson as Julia Banks, David's fiancée Katherine Heigl as Tessa Connover, David's ex-wife Geoff Stults as David Connover, Tessa's ex-husband and Lily's father Cheryl Ladd as Helen/"Lovey", Tessa's mother Sarah Burns as Sarah, David's friend since childhood Whitney Cummings as Ali, Julia’s best friend Simon Kassianides as Michael Vargas, Julia's abusive and violent ex-boyfriend Isabella Kai Rice as Lily Connover, Tessa and David's daughter Robert Ray Wisdom as Detective Pope Jayson Blair as Jason