Kate Monster is a main protagonist in Avenue Q. She is a monster who lives on Avenue Q. She is Princeton's love interest, and she likes him as well. According to the West End production's website, she is 23 years old.
Kate is a kindergarten teaching assistant. Her boss is Mrs. Thistletwat.
- What Do You Do With a B.A. In English / It Sucks To Be Me
- Everyone's a Little Bit Racist
- The Internet is for Porn
- Mix Tape
- You Can Be As Loud As The Hell You Want (When You're Making Love)
- Fantasies Come True
- There's a Fine, Fine Line
- The More You Ruv Someone
- I Wish I Could Go Back to College
- For Now
- Mary Faber
- Carey Anderson
- Christy Carlson Romano
- Anika Larsen
- Veronica J. Kuehn
- Kerri Brackin
- Brynn O'Malley
- Veronica Hodgson
- Gizel Jimenez
- Julie Atherton (2006-2007 and 2009)
- Rebecca Lock
- Cassidy Janson (2009-2010)
- Jacqui Sanchez (not on a regular basis, but she did perform her on occasion though)
- Rachel Jerram (understudy in 2010, regular in 2011)
- Katharine Moraz (2012)
- She has a similar appearance and demeanor to Prairie Dawn. Coincidentally, D'Abruzzo now performs Prairie in the current seasons of Sesame Street.
- She has a slight personality change in the school edition. In the original, she loves the internet, and modern technology in general, but in the school version she sees no use for the internet.
- The actress that plays her also plays Lucy the Slut.
- She comes off as friendly/kind, but actually is prejudiced against non-monsters.
| Princeton | Kate Monster | Rod | Nicky | Gary Coleman | Brian | Christmas Eve|
Lucy the Slut | Trekkie Monster | Bad Idea Bears | Mrs. Thistletwat | Ricky