Comedy duo Cheech and Chong will reunite for their first tour in more than 25 years, beginning Sept. 12 at the Tower Theatre in Philadelphia. More than 20 dates have been confirmed for the Live Nation-produced U.S. trek, with more to be announced in the coming weeks.

Cheech Marin and Tommy Chong's upcoming "Light Up America..." tour will visit such markets as Washington, D.C., Detroit, Atlanta, Miami, Seattle, Los Angeles, Boston and Denver. Tickets for the jaunt go on sale Aug. 8 via livenation.com.

Chong's wife and comedy partner, Shelby Chong, has been tapped to open all dates.

In their career as a comedy duo, Marin and Chong released nine albums between 1972 and 1985 and won a Grammy Award for best comedy album ("Los Cochinos") in 1973. The pair also co-wrote and starred in eight films, including "Up In Smoke," "Next Movie" and "Nice Dreams."

Here are Cheech & Chong's U.S. tour dates:

Sept. 12: Philadelphia (Tower Theatre)
Sept. 13: Washington, D.C. (Warner Theatre)
Sept. 19: Indianapolis (Murat Center)
Sept. 20: Detroit (Fillmore State)
Sept. 26: Atlanta (Tabernacle)
Sept. 27: Miami (Fillmore Jackie Gleason)
Oct. 24: Westbury, N.Y. (Westbury Theatre)
Oct. 25: Minneapolis (Orpheum Theatre)
Oct. 31: Houston (Verizon Wireless)
Nov. 1: Dallas (Majestic Theatre)
Nov. 7: Wallingford, Conn. (Chevrolet Theatre)
Nov. 8: Rosemont, Ill. (Rosemont Theatre)
Nov. 14: Phoenix (Dodge Theatre)
Nov. 15: Austin, Texas (Austin Music Hall)
Nov. 21: Sacramento, Calif. (Memorial Auditorium)
Nov. 22: Berkley, Calif. (Berkeley Community Theatre)
Nov. 28: San Diego (Copley Symphony Hall)
Nov. 29: Seattle (Paramount Theatre)
Nov. 30: San Jose, Calif. (San Jose PAC)
Dec. 6: Los Angeles (Gibson Amphitheater)
Dec. 12: Boston (Orpheum Theatre)
Dec. 13: Atlantic City, N.J. (Borgata Music Box)
Dec. 19: Reno, Nev. (Silver Legacy Casino)
Dec. 20: Denver (Paramount Theatre)