The Confessions of a Shopaholic star would take on the role of an illusion designer who helps a gang of magicians commit big-scale heists, Variety reports. Amanda Seyfried had been in negotiations for the part.
She could be joining confirmed cast members Mark Ruffalo, Morgan Freeman and Jesse Eisenberg, who plays the leader of the criminal group.
The Incredible Hulk's Louise Leterrier will be directing on the production which starts in January. He is working from a script by screenwriting duo Edward Ricourt and Boaz Yakin.
Fisher is currently committed to Baz Luhrmann's adaptation of The Great Gatsby. She will be appearing as Myrtle Wilson, a young woman having an affair with Joel Edgerton's Tom Buchanan.
The actress recently stepped in for Kristen Wiig in the adaptation of pregnancy manual What to Expect When You're Expecting.