Denis Coderre's old party is now called Mouvement Montréal

The official opposition at Montreal city hall, headed by interim leader Lionel Perez, is now called Mouvement Montréal.

Official opposition holds 25 of 65 seats on city council

Lionel Perez is the interim leader of Denis Coderre's old party. (Paul Chiasson/Canadian Press)

The official opposition at Montreal city hall is now called Mouvement Montréal.

Interim leader Lionel Perez made the announcement today. 

The party was formerly named after its previous leader, Denis Coderre, but Coderre left politics after he lost the election last month.

The official opposition has 25 of 65 seats on city council.