Warner Bros. Animation is making a new ‘Scooby-Doo’ feature film, based on the wildly popular brand, and we now have even more casting. Iain Armitage will play young Shaggy, while Mckenna Grace will portray young Daphne. Armitage broke out with his role in HBO’s ‘Big Little Lies,’ which has its second season premiering June 9th.… Continue reading ‘Scooby-Doo’ Animated Film Adds Iain Armitage & Mckenna Grace to Cast