Main •
Alex (voiced by Tucker Chandler) is a lion cub and is the leader of the Zoosters. He loves performing for big crowds and is always excited about going on big adventures with his friends. •
Marty (voiced by Amir O'Neil) is a zebra foal and is Alex's best friend. He's very well-organized and is very strict about safety and following the rules. He dreams of being a ranger horse someday. •
Melman (voiced by Luke Lowe) is a giraffe calf. Unlike the rest of his friends, he tends to be in his own little world and tends to get the most enjoyment out of things that other Zoosters may find boring. He tends to love Kate the most as he appreciates everything she does to take care of him. He also has a fear of butterflies. •
Gloria (voiced by Shaylin Becton) is a hippopotamus calf and is the only female Zooster. Like Alex, she loves to perform, which is mostly dancing and swimming. She is very kind and caring and also serves as the muscle of the Zoosters, though she often gets distracted by other things that interest her.
Supporting • '''Ant'ney''' (voiced by
Eric Petersen) is a street-wise adult pigeon who is friends with the Zoosters. He delivers any big news to the Zoosters that he hears on the streets of New York City and sometimes helps them out on their adventures. His favorite activity is finding food laying on the ground and eating it. •
Pickles and Dave (both voiced by Candace Kozak) are brother and sister chimpanzees who live in the trees in the same habitat as the Zoosters. Pickles is a very tomboyish monkey, while her brother, Dave, is deaf and communicates through
American Sign Language. They have a secret lever in their tree that they use to open a secret tunnel allowing the Zoosters to go out into the city, but only after the Zoosters pay them a toll(they are based on Phil and Mason from the movies). •
Kate (voiced by Jasmine Gatewood) is the Zookeeper of the New York Zoo. It's her duty to take care of all the animals at the zoo as best she can. Alex, Marty, Melman and Gloria are her favorites with Melman being the one who loves her back the most.
Recurring •
Carlos (voiced by Eric Lopez) is another employee in the zoo who often acts as Kate's second-in-command, but oftentimes, he doesn't know what he's doing. •
Ranger Hoof (voiced by
Da'Vine Joy Randolph) is a military horse who often visits the New York Zoo. Marty idolizes her and dreams of being a ranger horse just like her. •
Lucia (voiced by Myrna Velasco) is a
sloth who was introduced in Season 3 of the show. She's very excitable and loves to teach the Zoosters about things she learned in her homeland, but she also loves to learn new things as well. •
Lala (voiced by Grace Lu) is a Chinese litter frog tadpole who was introduced in Season 3. She is very optimistic about having new experiences and ends up becoming Gloria's best friend, but Gloria is a bit obsessed and overprotective with her. •
Murray (voiced by
Charlie Adler) and
Millie (voiced by
Johanna Stein) are an old married couple who live around the city. Murray is the only human in New York City who notices the Zoosters whenever they're out on the town, but his wife, Millie, doesn't ever believe him. == Episodes ==