Robert Downey Jr., still recovering from drug problems that led to his arrest more than a year ago, has signed on to star in a film based on the popular British miniseries "The Singing Detective."
The film, being financed by Mel Gibson's Icon Productions, is to begin shooting in April, Downey's publicist, Alan Nierob, said Thursday.
Downey has turned down several other offers while undergoing drug rehabilitation therapy, Nierob said.