
Katie Elizabeth Walder is the youngest of 5 children - 2 brothers and two sisters. She started acting at a young age in musicals and plays in school, and did some print work as a young teen in such magazines as Teen and YM. She went on to study theatre in college, and upon moving to NYC after graduation, started working professionally in theatre with notable Broadway directors such as Michael Greif (original director for "Rent"), Keith Reddin and Daniel Aukin. Katie soon moved to Los Angeles and quickly landed a recurring role on the 4th Season of Gilmore Girls (2000) as "Janet Billings", the quirky/tough/athletic college roommate of Rory. She has been working steadily in film & TV ever since.
Along with Gilmore Girls, Walder is best known for her recurring roles on How I Met Your Mother as Shannon and Mad Men as Sherry. She has appeared in over 40 television shows, including New Girl, Franklin & Bash, Fairly Legal, The Good Wife, Supernatural, and Rules of Engagement. In 2007, she played Tori (Zach's girlfriend) in the award-winning independent film "Shelter." In 2014, she starred in the horror film "Come Back to Me."
Known For

A Christmas to Treasure
Tipper Tisdale
2022

Station 19
Nancy · (1 episode)
2018

The Open House
Allison
2018

It Happened in L.A.
Zafu Girl
2017

S.W.A.T.
Stacey · (1 episode)
2017

Lethal Weapon
Denise Barnes · (1 episode)
2016

The Energy Specialist
Paige
2016

How to Get Away with Murder
Kelly Bryce · (1 episode)
2014

Scorpion
Jane Addison · (1 episode)
2014

Come Back to Me
Sarah
2014

Cupid
Trina
2012

Grimm
Elisha · (1 episode)
2011

New Girl
Cheryl · (2 episodes)
2011

Franklin & Bash
Kerry Dutton · (1 episode)
2011

The Good Wife
Jennifer Lewis · (1 episode)
2009

Trust Me
Jacy · (1 episode)
2009

Extreme Movie
Drunk Girl
2008

The Mentalist
Nancy Sterling · (1 episode)
2008

The Neighbor
Nancy
2007

Saving Grace
(1 episode)
2007

Mad Men
Sherry · (2 episodes)
2007

Shelter
Tori
2007

Rules of Engagement
Claire · (1 episode)
2007

McBride: Semper Fi
Kaia Rourke
2007

The New Adventures of Old Christine
Hannah · (1 episode)
2006

How I Met Your Mother
Shannon · (3 episodes)
2005

Supernatural
Fate / Atropos · (1 episode)
2005

Hustle
Janet · (1 episode)
2004

Cold Case
Beth Adams (1978) · (1 episode)
2003

Without a Trace
Claire Norton · (1 episode)
2002

CSI: Miami
Melinda Carson · (1 episode)
2002

Gilmore Girls
Janet Billings · (8 episodes)
2000

Law & Order: Special Victims Unit
Carey Thorne · (1 episode)
1999