The first round of tickets went on sale earlier this month and Williams' Oct. 23 Baltimore show sold out in 30 minutes, according to his website. The Oct. 2 show in West Lafayette, IN, goes on sale this weekend and tickets for the Oct. 4 Detroit performance and the late November two-night stand in Toronto will be offered up next week. A full list of on-sale dates can be found at Williams' website.

Between the current political landscape and his personal battles over the last couple of years, the funnyman said now is a perfect time to roll out some new material.

"It's an election year, which is basically Christmas for stand-up comics," Williams said in a statement. "And I figured I should get my ass on the road while the Shrub is still in office. A lot has happened in the world and in my life since I last did this six years ago and there's no better thrill and no better therapy than getting on that high-wire in front of a live audience."

Williams last toured in 2002 when he returned to the stand-up scene after a 16-year hiatus and scored one of the highest-grossing comedy tours in history, according to a press release. That outing's final performance in New York City was filmed by HBO for the special "Robin Williams: Live on Broadway," which was nominated for five Emmy awards.

Speaking of Emmys, Williams recently earned another nomination for his guest spot on the NBC-TV drama "Law & Order: SVU," in which he portrayed a troubled man who turns to acts of public anarchy. A recap of the episode is streaming at his website.

Williams--who has four Golden Globes, four Grammys and an Oscar on his mantle--is also keeping busy on the big-screen front with the upcoming films "World's Greatest Dad," "Old Dogs" and "Night at the Museum: Battle of the Smithsonian."