Big Day Out is preparing for its 20th birthday this summer, and as of this very morning, the first announcement is being made. And here's something exciting: headline acts are Soundgarden and Kanye West!

The list so far:

Kanye West

Soundgarden

Kasabian

Battles

Cage The Elephant

Best Coast

Mariachi El Bronx

My Chemical Romance

Unknown Mortal Orchestra

Gin Wigmore

Odd Future

Girl Talk

Royksopp

Foster The People

David Dallas

Cut Off Your Hands

Beastwars

Ghostwave

Mayavanya

The Living End