Colossus Casting Revealed in Deadpool Movie
While there was never an official announcement from Fox, it was revealed on twitter that actor Andre Tricoteux is playing the part of Coloss...

http://www.deadpoolbugle.com/2015/05/colossus-casting-revealed-in-deadpool.html
While there was never an official announcement from Fox, it was revealed on twitter that actor Andre Tricoteux is playing the part of Colossus in the Deadpool movie.
You're the best #Colossus a person could ask for Andre. 💚 https://t.co/mObR1L6TDR— Gina Carano (@ginacarano) May 29, 2015
That's a wrap for me! Thanks to all the cast and crew. @VancityReynolds @briannahilde @edskrein @ginacarano #Deadpool #Colossus #yvrshoots— Andre Tricoteux (@andretricoteux) May 29, 2015