Live action? They must be filming it like the Scooby-Doo movie. Everyone will be real except Underdog who is computer animated. But if they're gonna do it that way, they shouldn't just animate Underdog and none of the other animal characters, like Polly Purebread (I believe that was her name). In the Garfield movie, they only animated Garfield and not Odie or any of the other cats. It looked pretty weird.
Not that this matters a bit but you know how in Legally Blonde Elle's dog was named Bruiser? In the actual book they based it on his name was.... Underdog.
"It is written among the limitless constellations of the celestial heavens, and in the depths of the emerald seas....the world which we see is an outward and visible dream of an inward and invisible reality."