Cate Blanchett signs up to star in comedy 'Alpha Gang'

Cate Blanchett has signed up to star in the comedy 'Alpha Gang'.

The 54-year-old actress will play the leader of an alien invasion in the new movie from sibling filmmakers David and Nathan Zellner.

Cate's character Alpha One is the head of an alien gang on a mission to conquer Earth and arrives on the planet in human form with her fellow extraterrestrials as they pose as a leather-clad 1950s biker gang.

However, their invasion plans are interrupted when the gang catches the "contagious human diseases" of emotion.

The picture is due to begin shooting later this year with the Zellner brothers both directing and producing the flick.

Blanchett and Coco Francini are also involved as producers for their Dirty Films banner.

The pair said in a joint statement: "The Zellner brother's work never fails to surprise and delight us.

"In 'Alpha Gang', they have created a far-out world in order to lampoon something much closer to home: The hilarious, absurd, and peculiar truth of the human condition."