The Competition Bureau said it is seeking an end to the alleged practice, as well as a fine and other remedies.
Cineplex, Canada’s largest movie theatre chain, said it was reviewing the allegations and would respond in due course.
The Competition Bureau said it had received numerous complaints from consumers about the additional fees, which it said were not adequately disclosed. It said the fees can add up to 20% to the advertised price of a ticket.
The regulator said it was also seeking an order requiring Cineplex to inform consumers of the total price of tickets before they are purchased.
The Competition Bureau said it was taking the action to ensure that consumers are not misled by false or deceptive advertising. It said it was also seeking to ensure that businesses compete fairly in the marketplace.