[4][5] Lochhead sold the screenplay to Focus Features in March 2007, although he received a much higher bid from another American production company.

[8] Before Hanna had been produced, Lochhead was approached to pitch himself as a writer for Sherlock Holmes: A Game of Shadows and a film adaptation of the Masters of the Universe series featuring He-Man.

[7] He has written several screenplays since Hanna, including Cadar, which was sold to Spitfire Pictures, and Governess, which was picked up by Warner Bros. with Michael Bay as a producer.

[9] He has considered becoming a film director in addition to screenwriting, as well as relocating to Los Angeles.

[9] His mother is a feminist and his father is a skilled fisherman and carpenter; Lochhead has said they both influenced his self-sufficiency.