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Warner Bros. Pictures' dramatic thriller Unforgettable is the first film in the director's chair for veteran producer Denise Di Novi ("Crazy, Stupid, Love," "Focus").

Katherine Heigl ("27 Dresses," "Knocked Up"), Rosario Dawson (the "Sin City" films) and Geoff Stults (TV's "The Odd Couple"), star in the film. Unforgettable marks a reunion for Heigl and Di Novi, who previously collaborated on "Life as We Know It."

The main cast also includes young actress Isabella Rice ("True Blood"), Simon Kassianides (TV's "Agents of S.H.I.E.L.D."), Whitney Cummings ("The Wedding Ringer"), Robert Wisdom (TV's "Ballers") and film and television star Cheryl Ladd.

The film is produced by Di Novi, Alison Greenspan ("If I Stay") and Ravi Mehta ("Grudge Match"), with Lynn Harris serving as executive producer. The film was written by Christina Hodson.

Heigl stars as Tessa Connover, who is barely coping with the end of her marriage when her ex-husband, David (Stults), becomes happily engaged to Julia Banks (Dawson)—not only bringing Julia into the home they once shared but also into the life of their daughter, Lilly (Isabella Rice). Trying to settle into her new role as a wife and a stepmother, Julia believes she has finally met the man of her dreams, the man who can help her put her own troubled past behind her. But Tessa's jealousy soon takes a pathological turn until she will stop at nothing to turn Julia's dream into her ultimate nightmare.