Mastodon have become the latest band to join the Download 2013 bill.
The news comes in the same week that Stone Sour confirmed themselves for the Donington bash, which takes place across the weekend of June 14-16, 2013.
Mastodon have been confirmed to play the main stage on the Iron Maiden-headlined Saturday.
For more information, see Downloadfestival.co.uk. Ticket information is available now through Aloud.com.