The 62-year-old singer and actress is reported to be in talks to play Catwoman opposite Christian Bale in the third Batman film from British director Christopher Nolan.
The Oscar-winner will join a cast that includes Johnny Depp as The Riddler as she plays the whip-carrying burglar. The character has also been played by Michelle Pfeiffer and Halle Berry.
A studio executive said: "Cher is Nolan's first choice to play Catwoman. He wants to her to portray her like a vamp in her twilight years.