Jack Black and Kyle Gass will release their third studio album Rize of the Fenix on May 15 and will support the record with a handful of shows in June.
They will play two shows at London's Brixton Academy on June 5 and June 6, before moving on to Manchester O2 Apollo for a headline gig on June 10.
The concerts will sandwich their set at this year's Download Festival at Donington Park between June 8 and 10.
Rize of the Fenix will serve as the follow-up to 2006's The Pick of Destiny and contains 13 new tracks.
Tickets for Tenacious D's 2012 UK tour go on sale from 9am on March 9.
Listen to Tenacious D's 'Rize of the Fenix' below: