Among the guests joining Graham tonight: actor and writer Stephen Fry, promoting Troy, his latest reworking of the Greek myths, Mamma Mia star Amanda Seyfried, in new David Fincher film Mank, top TV chef Jamie Oliver, whose 7 Ways breathes new life into staple ingredients, Back to the Future star and Parkinson's disease activist Michael J Fox, discussing his memoir No Time Like the Future: An Optimist Considers Mortality, comedian Tom Allen, talking about his memoir No Shame and actor Nina Sosanya (W1A, Killing Eve) in Christmas drama Roald & Beatrix: The Tail of the Curious Mouse. Also, a special appearance by Dolly Parton, who performs I Saw Mommy Kissing Santa Claus.