Harry Styles

Self

Zayn Malik

Self

Liam Payne

Self

Niall Horan

Self

Louis Tomlinson

Self

Simon Cowell

Self (archive footage)

Dermot O'Leary

Self (archive footage)

Cheryl

Self (archive footage)

Dannii Minogue

Self (archive footage)

Louis Walsh

Self (archive footage)

Scott Mills

Self

Lucy Irving

Self - Narrator (voice)