Martinex T'Naga is a fictional character appearing in American comic books published by Marvel Comics. The character is depicted as being from an alternate future version of Marvel's shared universe, the Marvel Universe. Most of Martinex's adventures take place as a member of the 31st century Guardians of the Galaxy. His first appearance was in Marvel Super-Heroes #18, published January 1969. Michael Rosenbaum played Martinex in the Marvel Cinematic Universe film Guardians of the Galaxy Vol. 2 (2017) and will reprise his role in Guardians of the Galaxy Vol. 3 (2023).