Joe Homes. Joe Homes was >> in Adventure Time: The Movie - Gritty Reboots as 'Finn'.Kristina Horner. Kristina Horner was >> in Adventure Time: The Movie - Gritty Reboots as 'Princess Bubblegum'.Chris Parker. Chris Parker was >> in Adventure Time: The Movie - Gritty Reboots as 'Jake (Voice)'.Forest Gibson. Forest Gibson was >> in Adventure Time: The Movie - Gritty Reboots as 'Jake Mo-Cap'.Steven Hudson. Steven Hudson was >> in Adventure Time: The Movie - Gritty Reboots as 'Ice King'.Brad Walke. Brad Walke was >> in Adventure Time: The Movie - Gritty Reboots as 'Lemongrab (Voice)'.Tara Theoharis. Tara Theoharis was >> in Adventure Time: The Movie - Gritty Reboots as 'Marceline'.Brigid Lohman. Brigid Lohman was >> in Adventure Time: The Movie - Gritty Reboots as 'Flame Princess'.Kiri Callaghan. Kiri Callaghan was >> in Adventure Time: The Movie - Gritty Reboots as 'BMO'.