2010s
From 2010 until 2015, he appeared in the ITV period drama Downton Abbey, as Robert, Earl of Grantham, a role he repeated in the 2019 film. Bonneville again reprised the role of Robert Crawley in the 2022 film Downton Abbey: A New Era.
In early 2010, he appeared in the comedy film Burke and Hare. In 2011 and 2012, he starred as Ian Fletcher in the award-winning BBC comedy series Twenty Twelve. He reprised the role in the 2014 BBC comedy series W1A and the 2026 series Twenty Twenty Six. In December 2012, he appeared on BBC Two with co-star Jessica Hynes in World's Most Dangerous Roads, travelling through Georgia. He also appeared in the much-delayed film Hippie Hippie Shake with Cillian Murphy and Sienna Miller.
From 2011 until 2014, Bonneville was the narrator of the Channel 4 show The Hotel. On 18 November 2012, Bonneville appeared on stage at St Martin's Theatre in the West End for a 60th anniversary performance of Agatha Christie's The Mousetrap, the world's longest-running play.
Bonneville played Mr. Brown in the 2014 film Paddington and its 2017 sequel Paddington 2. He has appeared in the singing comedic role of Peter the Pillager, the Pirate King, in the ABC fairy tale-themed musical comedy extravaganza series Galavant during its 2015 and 2016 seasons. He also narrated the ITV series The Cruise.
In 2017, Bonneville portrayed Lord Mountbatten in director Gurinder Chadha's film Viceroy's House, which depicted the tumult and violence surrounding the Partition of India during the final days of British rule. Also in 2017, he portrayed the voice of Merlin in the movie based on the children's TV series Thomas & Friends, Journey Beyond Sodor. Also that year, he narrated the documentary A Return to Grace: Luther's Life and Legacy and it was announced that Bonneville would play Roald Dahl in an upcoming biopic about the author.
In 2018, Bonneville succeeded Julie Andrews as host and narrator of the annual "From Vienna: The New Year's Celebration" episode of Great Performances, broadcast on New Year's Day on PBS in the United States. Also in 2018, he returned to voice Merlin in one of the episodes of the twenty-second series of Thomas & Friends.
In 2019, Bonneville portrayed C. S. Lewis at the Chichester Festival Theatre's production of Shadowlands, along with actors Liz White and Andrew Havill.
