Leonardo DiCaprios J Edgar trailer online

If this trailer’s admissible as evidence, Leonardo DiCaprio looks set to finally bag a well-deserved Best Actor Oscar in 2012.

Whether he’s appearing as a young or old J Edgar Hoover in this trailer for Clint Eastwood’s long-awaited biopic, DiCaprio absolutely commands the screen.

And that’s before we’ve even seen the bits where he puts on a dress.

For anyone who doubted Leo’s chances of getting J Edgar’s distinctive voice right, this trailer takes seconds to assuage those doubts.

Seriously, this thing has multiple-Oscars written all over it. Check it out below, then tell us what you think.