Spray your slow cooker with non-stick cooking spray.
In a large bowl, beat together the cream cheese and sour cream until smooth and well combined.
Stir in the chopped roasted red peppers, mozzarella, Parmesan, garlic, Italian seasoning, salt, and pepper until everything is evenly mixed.
Transfer the mixture to your prepared slow cooker and spread evenly.
Cover and cook on LOW for 2 hours, stirring once halfway through, until hot and bubbly.
Switch to WARM setting and serve with crackers, pita chips, or fresh vegetables for dipping.