Tamsin Olivia Egerton (born 26 November 1988) is an English actress and model best known for her roles as Chelsea Parker in the 2007 film St Trinian's, Holly Goodfellow in the 2005 filmKeeping Mum and Guinevere in the 2011 TV series Camelot.
Egerton started her acting career age six, following her older sister, Sophia, to a local youth theatre, saying; "The whole reason I'm acting now is because I wanted to be doing what my big sister was doing". A year later, she appeared in a Royal Shakespeare Company musical production of The Secret Garden, playing Mary.
Egerton's other film credits include Sarah in Driving Lessons (2006) alongside Rupert Grint and Flora in Knife Edge (2008). She was to appear as Katrina in Eragon, but the scenes which she featured in were removed from the final cut.
Egerton starred as Princess Elenora in the TV children's series Sir Gadabout: The Worst Knight in the Land. In 2001, she starred as the "young" Morgaine in the TV miniseries The Mists of Avalon. She has also appeared on stage – in the RSC's musical version of The Secret Garden.
In 2009, Egerton appeared in the St Trinian's sequel, St Trinian's II: The Legend of Fritton's Gold.
Egerton attended Ditcham Park School near Petersfield in Hampshire, where she says she was bullied. She also states she truanted, preferring to go to modelling shoots; "I played truant all the time. I was modelling so I'd go to shoots and call in sick." After finishing school at 16 with nine A-grade GCSEs, Egerton decided to pursue acting rather than going to university, saying, "At drama school, they like to take you apart and rebuild you but I don't want to change now." She had a brief job as a babysitter for three children. She previously shared a flat in Marylebone, Central London, with her St Trinians castmate Talulah Riley, whom she described as her "soulmate". She lived inHampstead with theatre producer Jamie Hendry.
|2005||Keeping Mum||Holly Goodfellow||Niall Johnson|
|2006||Driving Lessons||Sarah||Jeremy Brock|
|Eragon||Katrina||Stefen Fangmeier||All of her scenes were cut from the completed film, but are shown on the special features of the DVD|
|St Trinian's||Chelsea Parker||Oliver Parker / Barnaby Thompson|
|2008||Knife Edge||Flora||Anthony Hickox|
|2009||St. Trinian's II: The Legend of Fritton's Gold||Chelsea Parker||Oliver Parker / Barnaby Thompson|
|The Story of F***||Daisy||James Abadi|
|2010||184.108.40.206||Cassandra||Noel Clarke / Mark Davis|
|2011||Chalet Girl||Georgie||Phil Traill|
|2013||Singularity||Laura Fennel||Roland Joffé||Post-production|
|2013||Grand Piano||Eugenio Mira||Post-production|
|2013||Justin and the Knights of Valour||Lara||Manuel Sicilia||Post-production|
|2013||The Look of Love||Fiona Richmond||Michael Winterbottom|
|2001||Hans Christian Andersen: My Life as a Fairytale||Kate Dickens|
|The Mists of Avalon||Young Morgaine|
|2002||Sir Gadabout: The Worst Knight in the Land||Princess Elenora|
|2004||Sherlock Holmes and the Case of the Silk Stocking||Miranda Helhoughton|
|2006||Mayo||Patti Feathers||episode 1, season 3|
|Silent Witness||Hannah Duncan||episode 7, season 10
episode 8, season 10
|2008||Trial and Retribution||Imogen Buller-Turi||Trial & Retribution XX: Siren|
|2010||Heston's Willy Wonka Feast||Herself|