Overview: The guests on Graham's sofa are Cher and Christine Baranski, who star in Mamma Mia! Here We Go Again; Rupert Everett, who talks about directing, writing and starring in his new film about Oscar Wilde, The Happy Prince; and Natalie Dormer, who discusses Picnic at Hanging Rock. With music from Tom Odell, performing his new single If You Wanna Love Somebody.