Based on the non-fiction book by Stephen Rebello, "Alfred Hitchcock and the Making of Psycho" has quite the roster of talent involved. In addition to Johansson, the film stars Anthony Hopkins as Hitch himself, Helen Mirren as his wife, Alma Reville, and James D'Arcy as Anthony Perkins.
"Making of Psycho" has taken a long road to the screen. Hopkins and Gervasi ("Anvil! The Story of Anvil") have been attached for over a year, but the project itself was originally set up back in 2007.
According to Variety, the role of Janet Leigh will give Johansson a meaty career boost; the trade paper's sources compare it to Michelle Williams's lead role in "My Week With Marilyn," which scored the actress an Oscar nomination. Whether Johansson will be as lucky remains to be seen.
D'Arcy is also a new addition to the cast, but his role as Perkins is apparently small. Not that it matters: dude looks so much like Anthony Perkins that it's kinda scary. He can just stand in the background, not hurting flies and such.