Vin Diesel was 48 in Guardians of the Galaxy Vol. 2 when he played the character 'Baby Groot (voice)'.
That was over 7 years ago in 2017.
Today he is 56, and has starred in 64 movies in total, 16 of those since Guardians of the Galaxy Vol. 2 was released.
In Guardians of the Galaxy Vol. 2, I think Vin Diesel looks: