Margo Martindale Credenza Twit (voice) Johnny Vegas Jim Twit (voice) Maitreyi Ramakrishnan Beesha Balti (voice) Ryan Anderson Lopez Busby Mulch (voice) Emilia Clarke Pippa (voice) Natalie Portman Mary Muggle-Wump (voice) Phil Johnston Mr. Napkin (voice) Alan Tudyk The Sweet-Toed Toad (voice) Jason Mantzoukas Mayor Wayne John John-John (voice) Timothy Simons Marty Muggle-Wump (voice) Nicole Byer Beverly Onion (voice) Zarah Kulczycki Harold Hulse (voice) Rebecca Wisocky Dee Dumdie-Dungle (voice) Mark Proksch Horvis Dungle (voice) Della Saba Dorcas Dumdie-Dungle (voice) Stephanie Escajeda Constance Klurb (voice) Dee Bradley Baker Muggle-Wump Efforts / Florbnorbles (voice) Rif Hutton Cop #1 (voice) Scott Whyte Voice Changer 30,000 / Rabney "Lyle" Kalemann (voice) David Cowgill Golf Announcer (voice) Hayley Williams Marleeta Punge (voice) Shane Sweet Triperot Man (voice)