Nick Kroll as: Nick Birch, an almost - adolescent boy living with loving and overprotective parents. He also has an older brother named Judd and an older sister named Leah. Maurice the Hormone Monster, a wild thing - type monster who follows Andrew around and is responsible for his brooding sexual desires, which frequently occur at inappropriate moments. Coach Steve, the middle school gym class teacher, who is incompetent and overly talkative, often trying to get his colleagues -- or even the students -- to hang out (often to no avail). It is heavily implied that the coach may be mentally disabled. Kroll also voices Lola, Lady Liberty, a ladybug, Joe Walsh, the ghosts of Picasso and Richard Burton, and Sylvester Stallone. John Mulaney as Andrew Glouberman, a young Jewish boy, who spends much of his time furtively masturbating. Mulaney also voices Mint, Grandpa Andrew, Babe the Blue Ox, and a detective. Jessi Klein as Jessi Glaser, a sarcastic and smart girl. Her father, named Greg, is an unemployed stoner and her mother, named Shannon, is secretly dating another woman. She gets her period for the first time on a school trip to the Statue of Liberty. Jason Mantzoukas as Jay Bilzerian, a boy who is obsessed with magic and sex. He has sex with a pillow that he made into a sex toy. His mom is mentally ill, his dad is a divorce lawyer, and his two older brothers are named Kurt and Val. He is obsessed with Nick 's mother and father and wishes for a loving family. Mantzoukas also voices the ghost of Socrates and Guy Bilzerian. Jenny Slate as Missy, a girl who is nerdy and kind. Her father is black and her mother is Mexican. Fred Armisen as Elliot Birch, Nick 's loving father, who frequently shares inappropriate stories. Armisen also voices the ghost of Antonin Scalia, a bus driver, and Stavros. Maya Rudolph as: Diane Birch, Nick 's loving mother, who babies him. Connie the Hormone Monstress, who follows Jessi around and encourages her to embrace her wildest desires. Rudolph also voices a bath mat, the ghost of Elizabeth Taylor, and the ghost of Whitney Houston. Jordan Peele as the Ghost of Duke Ellington, the late jazz musician whose spirit now lives in Nick 's attic and sometimes offers him advice. Peele also voices the ghost of Freddie Mercury, Atlanta Claus, a DJ, Missy 's father Cyrus, and Patrick Ewing.
who plays the hormone monster in big mouths
Nick Kroll