Marvin and Rochelle Humes attends the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
David Seaman (R) attends the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Tanya Burr attends the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Laura Whitmore attends the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Lilah Parsons attends the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Amir Khan and wife Faryal Makhdoom (R) attend the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Ulrika Jonsson and daughter attend the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
(L to R) Leigh-Anne Pinnock, Jade Thirlwall and Perrie Edwards of Little Mix attend the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Kye Sones (R) and guest attends the World Premiere of 'One Direction: This Is Us' at Empire Leicester Square on August 20, 2013 in London, England. (Getty Images)
Simon Cowell attends the "One Direction This Is Us" world premiere at the Empire Leicester Square on August 20, 2013 in London, England. (Getty Images for Sony Pictures)
Ronnie Wood and Sally Wood attend the "One Direction This Is Us" world premiere at the Empire Leicester Square on August 20, 2013 in London, England. (Getty Images for Sony Pictures)
(L-R) Director Morgan Spurlock, Harry Styles, Liam Payne, Niall Horan, Zayn Malik and Louis Tomlinson from One Direction speak on stage ahead of the "One Direction This Is Us" world premiere at the Empire Leicester Square on August 20, 2013 in London, England. (Getty Images for Sony Pictures)