Colossus is a fictional superhero appearing in American comic books published by Marvel Comics. He is the alter ego of Pyotr "Peter" Nikolayevich Rasputin (Russian: Пётр Николаевич Распутин). Created by writer Len Wein and illustrator Dave Cockrum, he first appeared in Giant-Size X-Men #1 (May 1975).
A Russian mutant, he is a member of the X-Men. Colossus is able to transform himself into metallic form, making him the physically strongest of the team. Even when his powers are not engaged, he is still a physically imposing figure of 6 ft 7 in (200 cm). He is portrayed as quiet, honest and virtuous. He has had a fairly consistent presence in X-Men-related comic books since his debut. A talented artist, he only reluctantly agrees to use his powers in combat, feeling it is his responsibility to use his abilities for the betterment of human- and mutant-kind.
Actor Daniel Cudmore portrayed Colossus in X2, X-Men: The Last Stand, and X-Men: Days of Future Past, and Stefan Kapičić provided the voice of a CGI Colossus in the 2016 film Deadpool. Wizard ranked Colossus at 184 on the Top 200 Comic Book Characters of All Time. In 2006, IGN placed Colossus in the 10th spot of their list of "The Top 25 X-Men". In 2013, ComicsAlliance ranked Colossus as #22 on their list of the "50 Sexiest Male Characters in Comics".