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. ==Personal life==