Joining Graham on his sofa are: Hollywood stars Reese Witherspoon and Will Ferrell, together in the screwball wedding comedy You’re Cordially Invited; pop icon and actress Ariana Grande, starring as Glinda in the hit film Wicked; and British actor Don Gilet, playing the new lead detective in the BBC series Death in Paradise. With music from Olly Alexander, performing his new single When We Kiss.