MIX 3 cups cereal, 2 cups popped popcorn, 1 cup pretzels and 1/2 cup nuts in large microwavable bowl.
MIX 3 Tbsp. melted butter, 1 Tbsp. Worcestershire sauce and 1 tsp. seasoned salt. Drizzle evenly over cereal mixture; toss to coat.
MICROWAVE on HIGH 2-4 minutes or until cereal is crisp, stirring after 2 minutes.