I Heart Arlo

Michael J. Woodard

Arlo (voice)

Mary Lambert

Bertie (voice)

Jonathan Van Ness

Furlecia (voice)

Brett Gelman

Marcellus (voice)

Tony Hale

Teeny Tiny Tony (voice)

Haley Tju

Alia (voice)

Mark Whitten

Alro (voice) / Baby Teeth (voice) / Mr. Jeromio Jones (voice) / Deckhand (voice) / Male Cop (voice) / Baby Teeth (voice) / Old Man (voice) / Rat King (voice) / Garbage Collector 1 (voice) / Sam (voice) / Tony's Dad (voice) / Family (voice) / Cats (voice)

Michelle McMillan

Chicken Vendor (voice) / Leisure Wear (voice) / Ms. Jeromio Smith (voice) / Stroller Woman (voice) / Old Woman (voice) / Random Crowd Person (voice) / Crowd (voice) / Sailor 2 (voice) / Sailor 4 (voice) / TV Reporter (voice) / Walla (voice) / Young Woman

Cathy Vu

Clown (voice) / News Anchor (voice) / Thao (voice)

Fred Tatasciore

Beast (voice) / Jeromio (voice) / Driving Guy (voice) / Detective Stroller / Jeromio (voice) / Grant (voice) / Dust Ghost (voice) / Unfulfilled Old Man (voice) / Chicken Customer (voice)

Vincent Rodriguez III

Ansel (voice) / Ansel (voice) / Child Ansel (voice)

Maria Bamford

Aunt Guy (voice) / Bortie (voice) / Cop (voice) / Garbage Collector 2 (voice) / Granny (voice) / Tony's Mom (voice) / Family (voice) / Cats (voice) / Wife (voice) / Kids (voice) / Walla (voice)

Jessica Williams

Mayor Elena (voice)

Annie Potts

Edmee (voice)

Jennifer Coolidge

Stucky (voice)

Flea

Ruff (voice)

Phil LaMarr

Bruce (voice) / Sailor 3 (voice)

Ryan Crego

Old Timey Singer (voice)

Melissa Villaseñor

Lily the Lobster Woman (voice)

Santigold

Bog Lady (voice)