We talked about The Wild Thornberrys having an all-star cast. We haven't even gotten to the Rugrats Go Wild film, which is a crossover movie featuring both the Thornberrys and the Rugrats. They even managed to get Bruce Willis to play Spike the dog! Nancy Cartwright, Lacey, Chabert, Tim Curry, Flea, Elizabeth Daily, and Tara Strong all appear in the film, along with more esteemed voice actors that we don't have the space to mention.
Knowing Willis from such blockbuster classics as the Die Hard film series, Death Becomes Her, Pulp Fiction, The Fifth Element, Armageddon, The Sixth Sense, Unbreakable, and Sin City, it's hard to imagine exactly how the producers of Rugrats Go Wild would have approached him about the role of Spike, a cartoon dog with a very small speaking role. It's fun to try, though!