Irish actress joins true crime indie.

Evanna Lynch (‘Harry Potter’) is to join Malcolm McDowell, Gary Oldman, Dominic Monaghan, and Joanne Whalley on the cast of the Douglas Rath-directed indie crime thriller ‘Monster Butler,’ reports THR.

The film is the true story of bisexual serial-killing con-man Roy Fontaine (McDowell), who cut a bloody swath through England and Scotland, hiring himself out as a butler, robbing his employers and in some cases murdering them.

Lynch is set for the role of “Fiona Carrick-Smith, the daughter of an upper-class family who becomes intrigued and involved with her family’s new, seemingly all-knowing butler. She soon acts out her desire for excitement and danger with him.