Sir Elton John is penning a film musical for  Ben Stiller - about a gay man with Aids.

The legendary singer wrote the score for the Broadway production of The Lion King, as well as the 2005 stage adaption of Billy Elliot.

And now the Rocket Man star, who has been with partner David Furnish for 15 years, is working on a controversial new film musical for actor/director Stiller.