Guardians of the Galaxy Vol. 2 (2017), Guardians of the Galaxy (2014)
Groot is an extraterrestrial tree-like humanoid with incredible strength, durability and can rebuild himself. He is an accomplice of Rocket Raccoon and the opposite in personality – Groot is very friendly, innocent and ‘sweet’.
Baby Groot in Vol. 2
Teenage Groot in Vol. 2 end-credits scene.