Vincent Martella Voice Thomas Brodie-Sangster Voice Ashley Tisdale Voice Caroline Rhea Voice Richard O'Brien Voice Dee Bradley Baker Voice Dan Povenmire Voice, Executive Producer, Director Mitchel Musso Voice Alyson Stoner Voice Jeff "Swampy" Marsh Voice, Executive Producer Maulik Pancholy Voice Kelly Hu Voice Tyler Mann Voice Olivia Olson Voice Kari Wahlgren Voice Zac Moncrief Director