Advance tickets can be purchased online through Broadwaymusicals.us. Also, theater tickets can be purchased in person from the Under the Big Top at Old Port of Montreal box office. All tickets are subject to service charges. Please note, all transactions at the Under the Big Top at Old Port of Montreal are cashless. All major credit cards and debit cards are accepted including Visa, MasterCard, American Express, Discover, and more. Service charges apply to all orders.