Singer Alicia Keys has won the starring role in an as yet untitled Disney film. Jeff Robinson wrote the screenplay which he describes as "a tearjerker".He expects Keys to begin work on the film next summer."It’s a little bit of Sparkle, a little bit of Lady Sings the Blues," Keys manager told MTV.com."A lot of people don’t know that she’s been acting longer than she’s been doing music. Her mother is an actress" he added.