Question: which English actor was a supporting cast in Tristan & Isolde

Context paragraphs:
Henry Cavill: Henry William Dalgliesh Cavill ( ; born 5 May 1983) is a British actor.  Cavill began his career starring in the film adaptations of "The Count of Monte Cristo" (2002) and "I Capture the Castle" (2003).  He later appeared in minor and supporting roles in television shows such as BBC's "The Inspector Lynley Mysteries", ITV's "Midsomer Murders" and Showtime's "The Tudors", then crossed to mainstream Hollywood films such as "Tristan & Isolde" (2006), "Stardust" (2007), "Blood Creek" (2009) and "Immortals" (2011).

Frank Mullings: Frank Mullings (10 March 1881 – 19 May 1953) was a leading English tenor with Sir Thomas Beecham's Beecham Opera Company and its successor, the British National Opera Company, during the 1910s and 1920s.  Blessed with a strong stage presence and a voice that provoked varying reactions from critics, his repertoire included such taxing dramatic parts as Tristan in "Tristan und Isolde", Radames in "Aida", the title role in "Otello", and Canio in "Pagliacci."  The limitations of early microphones meant that his voice was not always recorded successfully, although the British National Opera Company website notes that playing the recordings at 80 rpm produces a more reliable result.

Rufus Sewell: Rufus Frederik Sewell ( ; born 29 October 1967) is an English actor.  In film, he has appeared in Kenneth Branagh's rendition of "Hamlet" (1996) playing Fortinbras, "The Woodlanders", "Dangerous Beauty", "Dark City", "A Knight's Tale", "The Illusionist", "Tristan and Isolde", and "Martha, Meet Frank, Daniel and Laurence".  On television, he starred as "Obergruppenführer" John Smith in "The Man in the High Castle", an Italian detective in the BBC's television series "Zen" (2011) and also appeared in the mini-series "The Pillars of the Earth" (2010).  In 1993 he played the hero, Will Ladislaw, in the BBC's adaptation of George Eliot's "Middlemarch".  In 2003, he appeared in the lead role in "".  He starred in the CBS drama "Eleventh Hour", which was cancelled in April 2009.  On stage, he originated the role of Septimus Hodge in Tom Stoppard's "Arcadia" and the role of Jan in Stoppard's "Rock 'n' Roll"; the latter earned him an Olivier Award and a Tony Award nomination.

Someday This Pain Will Be Useful to You (film): Someday This Pain Will Be Useful to You is a 2011 comedy-drama film directed by Roberto Faenza based on Peter Cameron's novel of the same name.  It is primarily Italian financed, but was shot in English.  The teenage American protagonist was played by eighteen-year-old English actor Toby Regbo and the supporting cast is mainly American.

Tristan &amp; Isolde (film): Tristan & Isolde is a 2006 epic romantic drama film directed by Kevin Reynolds and written by Dean Georgaris based on the medieval romantic legend of Tristan and Isolde.  Produced by Ridley Scott (who had been working on an adaptation since the mid-1970s) and Tony Scott, the film stars James Franco and Sophia Myles, alongside a supporting cast featuring Rufus Sewell, Mark Strong, and Henry Cavill.  This was Franchise Pictures' last film before bankruptcy.

The Only Way Is Essex (series 8): The eighth series of "The Only Way Is Essex", a British semi-reality television programme, began airing on 24 February 2013 on ITV2.  The series consisted of 12 episodes.  Series 8 marked the first series not to feature Lydia Bright, after her departure from the series in December 2012.  The series also saw the departure of numerous supporting cast members and introduced new supporting cast members.

The Metropolis Case: The Metropolis Case is the debut novel of American author Matthew Gallaway.  The novel follows the interconnected lives of four characters living in different cities, all of whom have a great passion for Richard Wagner's opera "Tristan und Isolde".  The "New York Times" said "the book is so well written ... and filled with such memorable lead and supporting players that it quickly absorbs you into its worlds."  In the "Washington Post", Eugenia Zukerman wrote that "Gallaway has taken a great risk ... by creating an intricate, multilayered tale that slides from past to present, from Europe to New York, from opera to pop.  But despite the complexity, "The Metropolis Case" engages the reader emotionally on every page."

Matthias von Stegmann: Matthias von Stegmann (born 1968) is a German actor, voice-over speaker and writer, author and stage director for theatre and especially opera who works internationally.  He wrote dialogue and directed it for German versions of American series such "The Simpsons".  In opera, he has focused on the work of Richard Wagner.  He staged a version of his "Der Ring des Nibelungen" for children, first in Tokyo, then in German at the Vienna State Opera and in Zurich.  He staged in 2012 "Tristan und Isolde" in Minden, and in 2013 the first performance of "Rienzi" at the Bayreuth Festival.

List of Waterloo Road characters (series 8): The following is a list of characters who appear in the eighth series of the BBC school drama "Waterloo Road", in order of appearance.  The Eighth Series consists of Thirty Episodes, first broadcast from 23 August 2012 to 4 July 2013.  New Main Cast Members from Episode One include Head of English (later Head Teacher) Christine Mulgrew and History Teacher Audrey McFall, with Maggie Croft (later Budgen) and Lorraine Donnegan also promoted to the Main Cast.  New Pupil Characters from Episode One include Christine's son Connor Mulgrew, Imogen Stewart, Jade Fleming, Lula Tsibi, Rhiannon Salt and Angus Hancock.  Head of rival school Havelock High Gerald Findlay also appears in the first five episodes.  Episode four sees the first of several appearances of Imogen's mother Sally Stewart; Michael Byrne's father Billy debuts in the same episode, and appears until his death in Episode Ten.  Pupil Liberty Gordon first appears in Episode Five, and Kevin Skelton (later Chalk) also joins the supporting cast in Episode Eight.  Lorraine's sister Sonya Donnegan joins the main cast as School Secretary from Episode Nine.  Episode Eleven sees the Barry family, consisting of mother Carol and her children Barry, Dynasty and Kacey all join the supporting cast, with pupil Jack MacAllister also debuting in the same episode.  Towards the end of the series, supporting characters of Maintenance Assistant Ndale Kayuni, Dynasty's former boyfriend Steve-O Malone and Acting Head of Science Esther Fairclough all appear.  Angus Deayton and Richard Mylan join the cast as Head of Modern Languages George Windsor and Deputy Head Simon Lowsley in episodes Twenty-Seven and Twenty-Nine respectively.  Recurring Character Robert Bain, Head of Greenock Education makes his first appearance in episode Twenty-Seven, and wife of George Windsor, Princess first appears in episode Twenty-Nine.

Sophia Myles: Sophia Jane Myles ( ; born 18 March 1980) is an English actress, best known in film for portraying Erika in "Underworld" (2003), Lady Penelope Creighton-Ward in the live-action "Thunderbirds" film, Isolde in "Tristan & Isolde" and Darcy in "", and has received critical acclaim for her television work, particularly as Madame de Pompadour in the "Doctor Who" episode "The Girl in the Fireplace" and Beth Turner in "Moonlight".

Supporting paragraphs: Tristan &amp; Isolde (film) Rufus Sewell
Answer: Kevin