Keira Knightley began acting as a child and had several supporting roles such as in "Everest", but became famous after landing which role?
Elizabeth Swann
Everest (2015 film)
Everest is a 2015 British-American biographical adventure film directed and co-produced by Baltasar Kormákur, co-produced by Tim Bevan, Eric Fellner, Nicky Kentish Barnes, Tyler Thompson and Brian Oliver and written by William Nicholson and Simon Beaufoy, adapted from Beck Weathers' memoir "Left for Dead: My Journey Home from Everest" (2000).
 It stars an ensemble cast of Jason Clarke, Josh Brolin, John Hawkes, Robin Wright, Michael Kelly, Sam Worthington, Keira Knightley, Emily Watson, and Jake Gyllenhaal.
 It is based on the real events of the 1996 Mount Everest disaster, and focuses on the survival attempts of two expedition groups, one led by Rob Hall (Clarke) and the other by Scott Fischer (Gyllenhaal).
Keira Knightley
Keira Christina Knightley ( ; born 26 March 1985) is an English actress.
 She began acting as a child on television and made her film debut in 1995.
 After having worked in supporting roles in various films, Knightley gained recognition with the comedy-drama "Bend It Like Beckham" in 2002.
 She achieved international fame after landing the role of Elizabeth Swann in the "Pirates of the Caribbean" film series.
 One of the highest-paid actresses of Hollywood, Knightley has won an Empire Award, and has garnered multiple nominations for the Academy Award and Golden Globe Award.
Weatherby Swann
Governor Weatherby Swann is the fictional governor of Port Royal in Disney's "Pirates of the Caribbean" films: "" (2003), "" (2006), and "" (2007).
 Swann is the father of the movies' heroine Elizabeth Swann, played by Keira Knightley.
 In contrast to his strong-willed daughter, he is something of a milquetoast.
 Both Elizabeth and the Governor sailed from England to the Caribbean eight years before, along with then Lieutenant James Norrington, presumably when Swann assumed the governor's post.
 Swann is a doting father, and he wishes for his daughter to accept Commodore Norrington's marriage proposal.
 However, he eventually comes to accept that she truly loves Will Turner.
 According to the Pirates of the Caribbean Visual Guide, Elizabeth's mother died when Elizabeth was a young child.
 It is possible that Governor Swann holds some sort of peerage, as his butler refers to him as M'Lord.
 Many Colonial Governors held peerages or knighthoods, however, it is not directly stated in the films whether Swann holds one.
 Governor Weatherby Swann is portrayed by actor Jonathan Pryce. The Edge of Love
The Edge of Love is a 2008 John Maybury drama film starring Keira Knightley, Sienna Miller, Cillian Murphy and Matthew Rhys from a script by Sharman Macdonald, Knightley's mother.
 Originally titled "The Best Time of Our Lives", the fictional story concerns the famous Welsh poet Dylan Thomas (played by Rhys), his wife Caitlin Macnamara (played by Miller) and their married friends, the Killicks (played by Knightley and Murphy).
 It was an official selection at the Edinburgh International Film Festival. Domino (2005 film)
Domino is a 2005 action film directed by Tony Scott and written by Richard Kelly.
 An international co-production between France, the United States, and the United Kingdom, the film is inspired by Domino Harvey, the English daughter of stage and screen actor Laurence Harvey who became a Los Angeles bounty hunter.
 Its plot flashes back as Domino (Keira Knightley), fashion model-turned bounty hunter, narrates how a $10,000,000 robbery came about 36 hours before.
 Supporting roles include Mickey Rourke, Edgar Ramirez, Delroy Lindo and Mo'Nique.
 The film is dedicated to Domino Harvey, who died at only 35 years of age from an overdose of fentanyl on June 27, 2005, a few months before the film was released. Never Let Me Go (2010 film)
Never Let Me Go is a 2010 British dystopian romantic drama film based on Kazuo Ishiguro's 2005 novel of the same name.
 The film was directed by Mark Romanek from a screenplay by Alex Garland.
 "Never Let Me Go" is set in an alternative history and centres on Kathy, Ruth and Tommy portrayed by Carey Mulligan, Keira Knightley and Andrew Garfield respectively, who become entangled in a love triangle.
 Principal photography began in April 2009 and lasted several weeks.
 The movie was filmed at various locations, including Andrew Melville Hall.
 "Never Let Me Go" was produced by DNA Films and Film4 on a US$15 million budget. Anna Karenina (2012 film)
Anna Karenina is a 2012 British historical romance film directed by Joe Wright.
 Adapted by Tom Stoppard from Leo Tolstoy's 1877 novel of the same name, the film depicts the tragedy of Russian aristocrat and socialite Anna Karenina, wife of senior statesman Alexei Karenin, and her affair with the affluent officer Count Vronsky which leads to her ultimate demise.
 Keira Knightley stars in the lead role as Karenina, marking her third collaboration with Wright following both "Pride & Prejudice" (2005) and "Atonement" (2007), while Jude Law and Aaron Taylor-Johnson appear as Karenin and Vronsky, respectively.
 Matthew Macfadyen, Kelly Macdonald, Domhnall Gleeson and Alicia Vikander appear in key supporting roles. Jack Ryan: Shadow Recruit
Jack Ryan: Shadow Recruit is a 2014 American action spy thriller film directed by Kenneth Branagh.
 Chris Pine, Kevin Costner, Kenneth Branagh, and Keira Knightley star in leading roles.
 The film features the fictional character Jack Ryan created by author Tom Clancy.
 It is the fifth film in the "Jack Ryan" series but is presented as a reboot that departs from the previous installments.
 Unlike its predecessors, it is not an adaptation of a particular Clancy novel, but rather an original story.
 Pine stars in the title role, becoming the fourth actor to play Ryan, following Alec Baldwin, Harrison Ford, and Ben Affleck. Red Nose Day Actually
Red Nose Day Actually is a 2017 British romantic comedy television short film, acting as both a sequel to the 2003 feature film "Love Actually", and a part of the fund-raising event Red Nose Day 2017.
 "Love Actually" writer and director Richard Curtis returns alongside cast members Hugh Grant, Liam Neeson, Colin Firth, Andrew Lincoln, Chiwetel Ejiofor, Keira Knightley, Martine McCutcheon, Bill Nighy, Thomas Sangster, Lúcia Moniz, Olivia Olson, Marcus Brigstocke, and Rowan Atkinson. Marcus Seoige
Marcus Seoige (] ; born 1976) is an Irish actor.
 He was born on Inis Mór (where the family would spend each summer), but raised in Athlone.
 At university he studied Fine Art and computer animation but became involved in acting via Martial arts and medieval weapons stunt fighting.
 This led to him choreographing fight sequences and stunts for TV and film such as "King Arthur", with Clive Owen and Keira Knightley.