Madonna is hoping to resurrect her ailing film career

It is one of the greatest films of Hollywood's golden era, a triple Oscar-winning classic with electrifyingly charismatic stars and a script bursting with memorable lines.

But now Madonna has stunned the movie industry with plans to remake Casablanca.

The singer, whose previous film career has been littered with critical and commercial turkeys, is also planning to take the lead role of Ilsa Lund, which originally made a star of Ingrid Bergman.

A source at a major Hollywood studio that was recently approached by the 49-year-old star said: "She is still determined to make it in the movies.

"She and her representatives have been touting around a project which is a remake of Casablanca. The reception has been lukewarm to say the least. No one can understand why she wants to redo what many people consider the greatest film of all time."

In the 1942 original, Bergman starred opposite Humphrey Bogart, who played Rick Blaine, a cynical bar owner in the Moroccan city of Casablanca in the early days of the Second World War. Ilsa is torn between love for her husband, a Czech Resistance leader, and her ex-lover Rick.

Madonna is said to believe the film will make her reputation as an actress, after a string of high-profile flops such as Shanghai Surprise, Body Of Evidence and Swept Away, her much-derided 2002 collaboration with husband Guy Ritchie.

The source said: "Madonna is talking about taking the Ingrid Bergman role for herself, even though Bergman was in her 20s when she played Ilsa and Madonna is nearly 50.

"Madonna and her people are testing the waters to see if this is the right vehicle for her and if a major studio will get behind the project."