Harry Styles, Liam Payne, Louis Tomlinson, Zayn Malik and Niall Horan were in London today (19 August) for a photocall ahead of tomorrow night's premiere of the documentary movie.
But although they posed side-by-side on the red carpet for standard photographs, Harry and Liam each grabbed a bucket of popcorn and began throwing the cinema snack around for some snaps!
This Is Us hits cinemas in the UK on 29 August and indivual trailers for Harry, Liam, Louis and Niall have now been released as the excitement builds.
Sadly, there doesn't appear to be one for Zayn - but we can assure you he does appear in the film!
Irish Niall, who this weekend hit up Virgin Media's V Festival in Chelmsford, Essex, speaks in his trailer about his home life.
"You don't realise actually how much you appreciate your family and hometown until you're gone," he says. It also shows Niall's dad sorting through the piles of fan mail that drop though his door!
Watch the individual trailers here: