Which Irish actor played the main role in a screenplay based on British author E.J James' book as well as played serial killer Paul Spector?
Fifty Shades of Grey (film):  The film is based on the eponymous 2011 novel by British author E. L. James and stars Dakota Johnson as Anastasia Steele, a college graduate who begins a sadomasochistic relationship with young business magnate Christian Grey, played by Jamie Dornan. Jamie Dornan: James "Jamie" Dornan (born 1 May 1982) is an Northern Irish actor, model, and musician. Jamie Dornan:  He played Axel von Fersen in Sofia Coppola's "Marie Antoinette" (2006), Sheriff Graham Humbert in the ABC series "Once Upon a Time" (2011–2013), serial killer Paul Spector in the BBC Two and RTÉ One crime drama series "The Fall" (2013–2016), and Christian Grey in the "Fifty Shades" franchise (2015–present).
Jamie Dornan