From Billboard -

Stevie Nicks Joins Opening Leg Of Petty Tour

May 26, 2006, 11:00 AM ET

Clover Hope, N.Y.

Rock star Stevie Nicks will open the first eight shows on Tom Petty
and
the Heartbreakers' Highway Companion tour, which kicks off June 9 at
the Verizon Amphitheatre in Charlotte, N.C.

Nicks' performances include two shows in Virginia and a June 20 stop
in
New York's Madison Square Garden. Her final appearance on the outing
will be the June 21 gig at the Tweeter Center in Mansfield, Mass.
Nicks
is scheduled to perform a selection of songs with Petty.

Former Phish guitarist Trey Anastasio will also support the first
eight
shows, which will be followed by six double-bills with Pearl Jam
through July 2-3 in Denver.

The second leg of the tour in July and August features the Allman
Brothers Band and the Derek Trucks Band. Opening acts for the third
leg
in September, which includes a Sept. 17 headlining appearance at the
Austin City Limits Festival, have yet to be announced.