It Looks Like Groot Will Still Be a Sapling in Guardians of the Galaxy: Vol. 2

Chris Pratt posted the first promo picture of the upcoming Gurdians of the Galaxy: Vol. 2 on his Instagram. That tiny little figure riding on Drax's shoulder appears to be Groot. Now the question remains, will Vin Diesel still voice Groot?

More importantly, if he does, will he have to do an adorable falsetto to match Groot's new stature?