He is hoping to raise £12 million for the production, which will detail the events of the last three years of the playwright's life.
The Shrek 3 actor will star in and direct the movie from his own screenplay.
Contactmusic quotes him as saying: "I've done a script and I want to play him and direct the film. However, the hardest thing is getting the finance and investors want to know their money is going to a good place.
"Another problem is the Victorian era is expensive to reproduce and we want to film it in England, Italy and France where Wilde spent his last days."
He added: "What I really need now is a billionaire who loves Oscar Wilde and Rupert Everett and who will pay for the whole thing."
Everett stared in 1999 film The Ideal Husband, an adaptation of one of Wilde's plays.