Lillard Says 'Shaggy' Character Demanding

Matthew Lillard compares reprising his role as Shaggy in the new "Scooby-Do" film to running a marathon.

"It was definitely easier because I knew I could handle the process," Lillard told reporters recently, according to AP Radio. "It's like training for a marathon. You run a marathon once, and then going back to run it again, you know what to expect."

Lillard and his castmates teamed up for "Scooby-Doo 2: Monsters Unleashed," the sequel to 2002's "Scooby-Do."

"I watched a lot of Buster Keaton and Charlie Chaplin (films) before working on the project," he said. "We felt like the physical comedy of Shaggy worked real well the first time around, so the second time around we really tried to build some of those feats in even more so."

The 34-year-old actor said playing Shaggy was demanding.

"The endurance level it takes to do that kind of a character, the energy level is so intense, that at the end of it you just kind of fall apart."