So far, June 26 & 27 at Xcel Energy Center in St. Paul, Minn., and July 2 & 3 at the Pepsi Center in Denver have been confirmed. More shows with the two bands are expected.

The concerts are part of Tom Petty & The Heartbreakers’ 30th anniversary tour which is expected to start June 9, and will include dates with “some very special friends and opening acts.”

A tour itinerary should be available next week but aside from Pearl Jam, the very special guests are a mystery.

PJ hits the road again April in London, England, then moves on to the U.S. and Canada before returning to the U.K. in August for some big festival dates.