Her credits include Chicken Run (2000), Bridget Jones's Diary (2001), Heartbeat (2002-2010), Foyle's War (2003), Corpse Bride (2005), Breaking and Entering (2006), Home and Away (2018), Neighbours (2018), and All My Friends Are Racist (2021).

[3] In 2001, Kay appeared as Eleanor Ross Heaney in the romantic comedy film Bridget Jones's Diary,[4] in a cast which included Renee Zellweger, Hugh Grant, Colin Firth and Jim Broadbent.

[2] She played the character of Emma Bryden, a lonely single mother who forms a friendship with PC Phil Bellamy.

[2] In 2006, she starred alongside Jude Law and Ray Winstone in the Anthony Minghella directed romantic drama film Breaking and Entering (2006).

[5] The five-part series was written by Kodie Bedford and directed by Bjorn Stewart, and also starred Leah Purcell, Davey Thompson, and Tuuli Narkle.