The Spiderwick Chronicles is debuting on The Roku Channel this weekend, and it marks the first adaptation of Tony DiTerlizzi and Holly Black's book series of the same name since the 2008 movie was released. ComicBook.com recently had the chance to chat with Christian Slater, who plays Mulgarath in the new film. The iconic actor spoke about taking on the role that was played by Nick Nolte in 2008. Turns out, Slater isn't the only actor who has been thinking about previous performances. We also spoke with Jack Dylan Grazer, who plays Thimbletack, the role previously played by Martin Short. Of course, considering the age difference between Grazer and Short, fans can expect a different take on the Brownie.