Tointon's first appearance on television was in the
CBBC sitcom
Kerching!, where she played Tamsin, the love interest of the main character Taj Lewis. Her next role was in the series
Star 2003 where she played the character Billie. Following this, she played Celina Johnson in the British police drama series
The Bill. She also portrayed Casey in the horror film
The Children. In 2006, she appeared in the television series
Murder City, where she played Bethany Williams in the episode "Just Seventeen". She also appeared in
Dream Team as Savannah Caskey. She then went on to appear in
New Tricks, and had an uncredited part in the film
Just My Luck as a concert goer, along with sister
Kara. In early 2007, she appeared as Annabelle in
Genie in the House, and also played Maxine Brogan in
Doctors. Tointon is best known for her appearance on the Channel 4 soap opera
Hollyoaks. She made her first appearance on 30 April 2007, playing
Katy Fox, younger sister of
Warren Fox. Outside of
Hollyoaks, she is close friends with
Jamie Lomas (Warren Fox),
Chris Fountain (
Justin Burton),
Roxanne McKee (
Louise Summers) and Kent Riley (
Zak Ramsey). It was announced on 3 November 2007 that Tointon had quit
Hollyoaks to try new things, and that she will have played the character of Katy Fox for a year. She said that her intention was always to stay just for a year. She also starred in
The Children, a horror film which co-starred
Jeremy Sheffield, which was released in late 2008. In April 2010, Tointon appeared in the Cornetto Enigma TV advertisement. She appeared as
Simon's girlfriend
Tara, in
Series 3 of the Channel 4 sitcom
The Inbetweeners. Filming in spring 2010, she appeared from the second episode to the fourth. In March 2012, it was announced that Tointon would star in the forthcoming
ITV2 supernatural drama
Switch. In July 2012, she played a character called Frog in an episode of the
E4 series
The Midnight Beast, where she was Dru's girlfriend. She played Kuji in the
Sinbad episode titled Kuji. Also in 2012, she played the role of Kiki Delaine in
The Hour. Since 2014, Tointon has appeared as Maud Gunneson in the British-American horror series
Penny Dreadful. In September 2017, it was announced that she would be appearing in a new production of
Strangers on a Train. The production was expected to tour from 5 January to 31 March 2018. In October 2019 it was announced that Tointon would take over the role of Dawn in the West End production of
Waitress from 2 December 2019. In June 2022, she appeared as Rachel Saunders in the science fiction horror
TV adaptation of
The Midwich Cuckoos by
John Wyndham. This series was broadcast on
Sky Max on 2 June 2022. In January 2026, she appeared as Joy in the Channel 4 detective drama television series
Patience. == Personal life ==