
Acting
While at Jesus College, Cambridge, Montgomery was a member of the Footlights, its amateur theatrical club. Subsequently, she studied at the Central School of Speech and Drama. Montgomery built her career as one third of Comedy Theatre Company Population 3, along with James Bachman and Barunka O'Shaughnessy, and she appeared as a roving reporter for the comic television programme The Friday Night Project. Other television work has included Bo' Selecta!, The Mighty Boosh, and The IT Crowd. Montgomery has been heard in several Radio 4 programmes, including the radio phone-in spoof Down the Line, Robin and Wendy's Wet Weekends, The Way We Live Right Now, The Museum of Everything, The Department, Another Case of Milton Jones, The Party Line, Harry Hill's Ghost of a Christmas Present, The Pits, the Torchwood story "Lost Souls" and Lucy Montgomery's Variety Pack. She produced a pilot for her own sketch show pilot for the BBC called The Full Montgomery which went on to run on Radio 4 for two series. In 2005, Montgomery began writing for and performing in the comedy sketch show Tittybangbang on BBC Three. The sketch comedy series also stars Debbie Chazen and has had three series, from 2005 to late 2007. She was in The Armstrong and Miller Show on BBC One, and Bellamy's People on BBC Two. She has also been on The Law of the Playground and The Wall on BBC Three. She provided the voice of Destiny in Mongrels. Montgomery had various roles in The Life of Rock with Brian Pern and Harry and Paul's Story of the Twos. She was also the voice of Jeanine and other female characters in the Animated Puppetoon children's television series A Town Called Panic. She voiced for the series Badly Dubbed Porn on Comedy Central. She has starred in many stage productions, including leads in record-breaking and critically acclaimed Jerusalem with Mark Rylance at the Royal Court in 2009, the 2011–12 revival of Stephen Sondheim's Company at the Sheffield Crucible and Canvas at the Chichester Festival in 2012. Montgomery appeared in the musical Viva Forever!, based on the music of the Spice Girls.

Disenchantment
2018

Hey Duggee
2014

The IT Crowd
2006

Strike
2017

Stan Can
2025

Alan Davies: As Yet Untitled
2014

Absolutely Fabulous
1992

The Mighty Boosh
2004

Hilda
2018

Mid Morning Matters with Alan Partridge
2010

Wonderblocks
2025

Thomas & Friends: Journey Beyond Sodor
2017

Mongrels
2010

Big Tree City
2022

Bellamy's People
2010

Digby Dragon
2016

Strutter
2006

The Windsors
2016

Crackanory
2013

Dreaming Whilst Black
2021

Boat Story
2023

Horrible Histories: The Movie — Rotten Romans
2019

10 Days to War
2008

Let's Dance for Sport Relief
2010

Worzel Gummidge
2019

Bob the Builder: Mega Machines
2017

The Robinsons
2005

Breathtaking
2024

Full English
2012

Hilda and the Mountain King
2021

Tittybangbang
2005

Thomas & Friends: Big World! Big Adventures! The Movie
2018

Circles
2016

The Jewish Enquirer
2020

Headcases
2008

Thomas & Friends: Danger at the Docks
2018