Here's an interesting bit of trivia I just found on IMDB (sorry if it belongs elsewhere).

Best Actor nominee Benedict Cumberbatch and Alan Turing (the character he portrays in his Oscar-nominated performance) are actually related in real-life. According to the family history site Ancestry, the two are 17th cousins with family relations dating back to the 14th century. Both are said to be related to John Beaufort, the first Earl of Somerset, through Cumberbatch and Turing's respective paternal lines. This means that for the first time, a performer is nominated for portraying a known real-life relative since Katharine Hepburn won for her performance in The Lion in Winter (1968).