Katherine Heigl will star in the Warner Bros. thriller "Unforgettable," directed by Denise Di Novi, which begins principal photography on Monday, August 17 in Los Angeles.

Katherine Heigl Sporting A New Hair Color For Her New Movie Unforgettable

On Sunday, Katherine revealed that she had dyed her hair platinum blonde for the then unannounced role, sharing the new hue via her social media channels. Di Novi will produce "Unforgettable" with partner Alison Greenspan from a Christina Hodson script. Shooting is expected to last until late September and Rosario Dawson will co-star.

The story revolves around a woman starting a new life with her new husband and his daughter, who finds herself tormented by the man's manipulative and mentally unstable ex-wife. Katherine will play the disturbed ex and menace to Rosario Dawson's character.

Katherine previously starred in the Di Novi-produced and Greg Berlanti-directed Life as We Know It for the same studio.