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Check out what happened when the premiere finished and the group hit London with their showbiz pals.
After telling reporters at a press conference for the movie that he was no longer single, Liam went public with his new girlfriend Sophia Smith at the after-party. Picture: Goff
The couple sparked engagement rumours after the Little Mix star was seen wearing a diamond ring on her wedding finger. Picture: Goff
The music mogul told reporters on the red carper of the premiere that he felt "like a father" watching the boys enjoying their big moment.
The boys were joined by members of their family for the event in London's Leicester Square and all celebrated together that evening.
The British comedian recently helped write the music video for the band's new single 'Best Song Ever'.
The happy couple are close friends with the group and were full of praise for the movie speaking to Capital FM. Picture: Goff
The One Direction star was joined by his family and the lady who gave him his first ever audition for the premiere.
The legendary rocker was also griped in One Direction mania in London this week.
The One Direction man was in good spirits as he took time to hang out with everyone in attendance at the party.
The four-piece were thrilled to see the success of the boyband and told Capital they are definitely Directioners.
The Little Mix star showed off her pins as she posed for a quick shot.