Reese Witherspoon, Will Ferrell, Ariana Grande, Don Gilet, Olly Alexander

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.