My Nanny's Secret (originally A Nanny's Secret) is a 2009 Lifetime Channel original Thriller/Mystery/Crime movie starring Haylie Duff and directed by Douglas Jackson. A home invasion robbery ends in tragedy when a member of the wealthy Tyrell family is killed. Their live-in nanny, Claudia (Haylie Duff), begins to secretly suspect that her troubled brother (Dillon Casey) may be the murderer. Unwilling to share her suspicions until she is certain, Claudia begins her own investigation, which takes her down a very dark and unexpected road. The more that Claudia finds out about the killer, the closer she comes to their secrets, ultimately putting her own life in terrible danger. The film premiered on October 7, 2009 in Canada and December 26, 2009 in the US.