Man killed in crash south of Perth

A man has been killed and another seriously injured in a two-car crash south of Perth.

A red Holden utility and a Lexus four wheel drive crashed on Boyanup-Picton Road near Bunbury shortly after 6am on Sunday.

The driver of the ute, a man in his 50's from Australind, died at the scene and the driver of the Lexus, a man in his 40's also from Australind, was taken by helicopter to Royal Perth Hospital with head injuries and is in a serious but stable condition.