Among the guests joining Graham tonight: Irish actor and singer Jessie Buckley, starring in Charlie Kaufman's Netflix drama I'm Thinking of Ending Things; comedian and Strictly contestant Bill Bailey, presenting his Remarkable Guide to Happiness; Oscar-winning Hollywood star Octavia Spencer, in the new film adaptation of Roald Dahl's The Witches; BBC security correspondent Frank Gardner, presenting his candid documentary Being Frank: The Frank Gardner Story; and one of our most successful and best-loved children's authors, David Walliams, whose latest book is a WWII adventure, Code Name Bananas. With music from Dermot Kennedy, who performs his current single Giants.