Groot is a fictional character appearing in American comic books published by Marvel Comics. He is a tree-like creature and a member of the Guardians of the Galaxy, a team of interstellar heroes. Groot is known for his ability to regenerate from even the smallest twig and his limited vocabulary, which consists solely of the phrase "I am Groot." Despite his limited speech, Groot is a fiercely loyal friend and a formidable warrior. He was voiced by Vin Diesel in the Marvel Cinematic Universe, first appearing in "Guardians of the Galaxy" (2014) and later appearing in several other Marvel films.