2006 BBC sci-fi film A for Andromeda. Prominence in television and film (2007–2014) Cox's breakout role was as the main protagonist, Tristan Thorn, in the 2007 fantasy film Stardust, in which he starred opposite Claire Danes. The film was successful with both critics and audiences globally and introduced Cox to a wider audience. He made his West End debut the following year in Harold Pinter's The Lover/The Collection at the Ambassadors Theatre in London. It began previews on 15 January 2008 and opened on 29 January. He was next seen in the 2008 film Stone of Destiny as Ian Hamilton and in the 2009 historical drama Glorious 39, which were widely released in the United Kingdom. In 2010 he had the title role in Kleist's The Prince of Homburg at the Donmar Warehouse in London. In September of that year, he played the closeted gay Duke of Crowborough in the first episode of the ITV drama series Downton Abbey. In 2011 he played St. Josemaría Escrivá in the Roland Joffé film There Be Dragons and Ishmael in Encore's Moby Dick miniseries. Also in 2011, he signed on for a recurring role in the second season of the Martin Scorsese-produced HBO original series Boardwalk Empire as Owen Sleater, an Irish enforcer with ties to the IRA. His character became a regular for the series' third season, broadcast in September 2012. He received a Screen Actors Guild Award as part of the ensemble in 2011 and another nomination the following year. In 2013 he starred in the independent film Hello Carter and the BBC Cold War thriller Legacy. He had lead roles in two unproduced CBS TV pilots: a political drama titled The Ordained in February 2013 and an untitled Wall Street show executive-produced by John Cusack in February 2014. At the end of 2013, production began on the film The Theory of Everything, where Cox portrays Jonathan Hellyer Jones, the second husband of Jane Hawking. The film premiered at the Toronto International Film Festival in September 2014 and was nominated for Best Picture at the 2015 Academy Awards. Daredevil (2014–2018) Cox portrayed Matt Murdock in Marvel's Daredevil TV series as well as the 2017 team-up miniseries event The Defenders, produced and released through Netflix. His performance was praised and given a Helen Keller Achievement Award for his role by the American Foundation for the Blind. It was announced that Cox had