That Vin Diesel plays Groot in the Marvel Cinematic Universe is a well-known fact, but there are other actors that have played the member of the Guardians of the Galaxy in the MCU, with each one helping to bring a version, or more, of the lovable Marvel character to life. First debuting in the MCU with James Gunn's Guardians of the Galaxy (2014), Groot then exploded in popularity in order to become one of the most loved Marvel characters on the planet, despite never having been a huge name in the comics. Gunn's found family franchise proved itself endearing, with Groot playing a pivotal role in its success.
https://screenrant.com/every-groot-mcu-actor-voice-motion-capture/