David Armstrong-Jones (L), 2nd Earl of Snowdon, known as David Linley, and his sister Lady Sarah Chatto (R) stand together as they talk with guests after attending a service of thanksgiving in honour of the late British photographer Antony Armstrong-Jones, the former husband of Queen Elizabeth II's late sister Princess Margaret, better known as Lord Snowdon (1st Earl of Snowdon), David and Lady Sarah's father, at St Margaret's Church in London on April 7, 2017. 
Lord Snowdon died at the age of 86, the photographic agency where he worked said on January 13. / AFP PHOTO / POOL / Justin TALLIS        (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)