Wanyama joins as a Designated Player on a free transfer from Spurs. He's signed a three-year contract with the club.
“Victor is an important player with a great career," said Sporting Director Olivier Renard. “His undeniable experience will also help support the young players and help them progress."
Wanyama also stated: “I'm really happy to join an exciting club like the Montreal Impact.
“MLS continues to grow every season and I'm looking forward to bringing further awareness to this team, city and league across Africa. When I spoke to Thierry (Henry) and he told me he wanted me to join him in Montreal, I didn't have to think twice. He has always been a player that I've admired, and I am really happy to get the opportunity to work with him and to play a part that can ensure that the Montreal Impact have an improved season and hopefully reach the ultimate stages of the competitions in which we compete.
"I think the Saputo family and the management team in Montreal have a great plan in place and I am hoping I can make a great contribution to the success of this project."