The G20, which unites 20 of the worlds' finance ministers and central bank governors, is known for drawing crowds of protestors, and in the past, varying degrees of violence. As a result, Mirvish Productions has cancelled performances of both Rock of Ages and Mamma Mia! for the week of June 21-27.

Playbill.com spoke with Mamma Mia cast member Elena Gutierrez, who said, "Due to the location of both the Royal Alexandria Theatre and the Princess of Wales Theatre, they have declared the areas unsafe and cancelled performances the entire week. There is a specific radius that is blocked off due to the G20 and businesses of all kinds are forced to close for the week if they are inside that radius."

Both the Princess of Wales Theatre, where Mamma Mia! plays, and the Royal Alexandria Theatre, home to Rock of Ages, fall within the G20 radius. Gutierrez states that cast members from her production were given two to three weeks notice of the cancellation and will receive per diem (funds provided for daily living expenses while on the road) during the hiatus.

The date of the Toronto cancellation for Mamma Mia! would have been the ninth and final week of the current tour, which will relaunch in October in Alaska.

Theatre isn't the only event taking the hit. The Toronto Blue Jays, who were originally scheduled to play the Phillies at the Rogers Centre in downtown Toronto, have relocated their June 26-27 games to Philadelphia. Ticket holders for the cancelled dates for Mamma Mia! and Rock of Ages may phone (416) 872-1212 or (800) 461-3333 for refunds or exchanges.