Career: After landing the leading role in the Potter films, Radcliffe's profile went stratospheric. Away from all things Harry, he made a splash in February 2007 when he trod the boards in a revival of the controversial play Equus. Radcliffe gained rave reviews for his portrayal of Alan Strang - a role that required him to be nude on stage. He's also taken roles in the smaller budget film December Boys and TV drama My Boy Jack. In 2011 he played J Pierrepont Finch in the Broadway revival of How To Succeed in Business Without Really Trying. He had a box office hit with horror movie The Woman in Black, and enjoyed critical success with Kill Your Darlings, in which he played Beat poet Allen Ginsberg. He continues to push himself in a wide variety of theatre and film roles.

Career: In 2000, casting began for the first Harry Potter movie, Harry Potter and the Philosopher's Stone. Grint sent a video to the casting team of himself rapping about how he wished to play the role of Ron Weasley. On August 8, 2000, Grint, Daniel Radcliffe and Emma Watson were selected to play Ron, Harry and Hermione. The rest they say is history. The first Harry Potter movie was released in 2001 and it was the highest-grossing film of that year. Grint reprised his role in seven further Harry Potter movies that were just as successful as the first, not only in his home country but around the world. His other films have included Driving Lessons (2006), Cherrybomb (2010) and Into the White (2012).

Career: Casting agents for Harry Potter and the Philosopher's Stone found Watson through her Oxford theatre teacher. The release of the film in 2001 marked her professional acting debut. She went on to star as Hermione Granger in a further seven Harry Potter films, alongside Daniel Radcliffe and Rupert Grint. In the post-Harry Potter era, Watson has starred in My Week with Marilyn (2011), The Perks of Being a Wallflower (2012), The Bling Ring (2013), This is the End (2013) and Noah (2014).

Career: Following a successful spell on stage he turned to movies, making a massive impact as Sid Vicious in Sid and Nancy in 1986, and Prick Up Your Ears a year later. Alcoholism threatened his career, but he has now quit booze. His roles include playing Lee Harvey Oswald in JFK, the title role in Bram Stoker's Dracula, and Mason Verger in Hannibal. Other projects include Lost in Space, Leon, and The Fifth Element. His directorial debut, the acclaimed Nil By Mouth, was a heart-breaking, semi-autobiographical movie about his childhood. Oldman suffered a career slump around the Millennium, when he concentrated more on raising his young family than he did on acting. But he came back stronger than ever with roles in Harry Potter and the Prisoner of Azkaban, Tinker Tailor Solider Spy (for which he was Oscar nominated) and the Batman franchise.

Career: Helena's professional debut came at 16 in a TV commercial, swiftly followed by small-screen movie Pattern of Roses. The film Lady Jane followed, but it was 1985's A Room with a View which made her a star. Roles in Hamlet, Howards End and Frankenstein followed, and she was Oscar-nominated for 1997's The Wings of the Dove. The actress went on to prove she could do more than just period drama in projects such as Fight Club, Planet of the Apes, Big Fish, and Charlie and the Chocolate Factory, and lent her voice to animated movies Corpse Bride and Wallace and Gromit in The Curse of the Were-Rabbit. She made her musical debut in the big-screen version of Sweeney Todd: The Demon Barber of Fleet Street. She's since appeared in Dark Shadows, Les Miserables and Burton & Taylor, and played Bellatrix Lestrange in several of the Harry Potter movies.