Who's that girl? Jared Leto shows off his extreme weight loss in dress and heels as he joins shrinking co-star Matthew McConaughey on set of new film.

He recently revealed his shockingly skinny frame and concave stomach in a dramatic photograph taken by Terry Richardson.

And Jared Leto was showing off his extensive weight loss again today as he emerged on the set of The Dallas Buyers Club on Monday in a wig, lipstick and tinted sunglasses added to the overall look, with the once muscley actor unrecognisable in his role as an HIV positive transvestite.

Below is a before and after! Very scary.