Styx, REO Speedwagon and ex-Eagles guitarist Don Felder will begin a summer tour dubbed "United We Rock" in June, with U.S. dates through August.

"I called up [Styx's] Tommy Shaw last summer and we were both thinking the same thing: Let's get the boys together, make some music, and have some fun," REO frontman Kevin Cronin said in a news release. "REO Speedwagon and Styx together is a head-first plunge into the fountain of youth, an unstoppable force of nature. Add the amazing Don Felder to the mix and it's a thundering slam dunk."

Headliners will rotate. Look for a complete list of dates, cities and venues below. Tickets go on sale via Live Nation beginning Feb. 24.

These three bands have a rich shared history, both on the road and in the studio. REO Speedwagon and Styx toured together in 2013, 2012 and in 2009 – marking that first occasion with a collaborative single called "Can't Stop Rockin'" co-written by Shaw and Cronin. Arch Allies: Live at Riverport, a 2000 album recorded at the Riverport Amphitheatre in Missouri, featured both REO and Styx, as well.

Styx and Don Felder are coming off a five-night stand in January at the Venetian Theatre in Las Vegas. REO Speedwagon's Dave Amato also sat in with Felder for a performance of "Hotel California," during February's Rock Legends Cruise.

"Hitting the road with REO and Don Felder is gonna be an unforgettable evening of music for the fans," Shaw said, "and another chance to hang with these good time friends of ours who love the life as much as we do."

'United We Rock' Tour Dates:

6/20 - Ridgefield, WA, Sunlight Supply Amphitheatre

6/21 - Auburn, WA, White River Amphitheatre

6/23 - Concord, CA, Concord Pavilion

6/24 - Los Angeles, CA, Greek Theatre

6/25 - Paso Robles, CA, Vina Robles Amphitheatre

6/27 - Salt Lake City, UT, USANA Amphitheatre

6/29 - Denver, CO, Pepsi Center

7/1 - Tinley Park, IL, Hollywood Casino Amphitheatre

7/18 - Tampa, FL, MidFlorida Credit Union Amphitheatre

7/19 - West Palm Beach, FL, Perfect Vodka Amphitheatre

7/20 - Jacksonville, FL, Daily’s Place

7/22 - Nashville, TN, Ascend Amphitheatre

7/23 - Alpharetta, GA, Verizon Wireless Amphitheatre

7/25 - Detroit, MI, DTE Energy Music Theatre

7/27 - Indianapolis, IN, Klipsch Music Center

7/29 - Houston, TX, Cynthia Woods Mitchell Pavilion

7/30 - Dallas, TX, Starplex Pavilion

8/11 - Bethel, NY, Bethel Woods Center for the Arts

8/12 - Atlantic City, NJ, Borgata Event Center

8/13 – Bristow, VA, Jiffy Lube Live

8/15 - Gilford, NH, Bank of NH Pavilion

8/16 - Wantagh, NY, Northwell Health at Jones Beach Theater

8/18 - Niagara Falls, NY, Seneca Niagara Events Center (Styx / REO only)

8/19 - Mansfield, MA, Xfinity Center

8/20 - Bangor, ME, Darling’s Waterfront Pavilion

8/22 - Holmdel, NJ, PNC Bank Arts Center