Graham is joined by star of The West Wing, Martin Sheen and stand-up Ed Byrne. The pair join Graham through a walk-through scene, similiar to one associated with episodes of The West Wing. Ed talks about getting married. Plus will.i.am performs his new single Heartbreaker, featuring Girls Aloud member, Cheryl Cole.

The fifth season premiere featured guests Sarah Ferguson, the Duchess of York, and Irish stand-up comedian Ed Byrne.

Among the guests are Hollywood superstar Robert Downey Jr, who talks about his role as Sherlock Holmes in Guy Ritchie's new movie, while Graham's fellow Irishman Ed Byrne is in the comedy chair. Will Young chats and sings his hit song You and I.

Graham is joined by Dame Helen Mirren, talking about her new film Brighton Rock; Devil Wears Prada actress Emily Blunt; top comedian Ed Byrne; and The Wanted, who perform in the studio.

Graham is joined on the show by Johnny Depp, Ricky Gervais, Ed Byrne and Snow Patrol.

Together on Graham's sofa are Harry Potter star Daniel Radcliffe; Isla Fisher, one of the stars of The Great Gatsby; its director, Baz Luhrmann; comedian Ed Byrne; and Wretch 32, who performs in the studio.