In an interview with MTV, Daniel Radcliffe talks about the rumors Equus on Broadway in 2008 and says:

There’s an internet frenzy of people who think it’s happening in the spring, but it would be six months later than that. In all probability, if everything goes according to plan, it would definitely be me and Richard Griffiths and how many other cast members the unions will allow.

You can watch an interview HERE.

Thanks DanielRadcliffe.co.uk!