I am Groot

Groot is a character appearing in American comic books published by Marvel Comics. Created by Stan Lee, Larry Lieber and Jack Kirby, the character first appeared in Tales to Astonish #13. An extraterrestrial, sentient tree-like creature, the original Groot first appeared as an invader that intended to capture humans for experimentation. The character's speech capability is limited to the phrase "I am Groot", which can have different meanings depending on context. In the Marvel Cinematic Universe (MCU) franchise, Star-Lord, Thor, Rocket Raccoon, Gamora, Drax the Destroyer and, eventually, Nebula, daughter of Thanos are able to understand him.