Thanks to TheWrap.com, we know now who will be voicing the young versions of Fred Jones and Velma Dinkley in the 2020 theatrical film SCOOB!, following the recent announcement about Iain Armitage and McKenna Grace playing young Shaggy and Daphne, respectively. Pierce Gagnon will be providing the voice of young Fred. Gagnon is most famous for his work in the TV series Twin Peaks. Additionally, Ariana Greenblatt will be voicing young Velma. Greenblatt is widely known for her role in Avengers: Infinity War as young Gamora.