Main characters
Harry Styles as Harry Hemmings
Luke Hemmings as himself
Ariana Grande as Ariana Styles
Gemma Styles as herself
Michael Clifford as himself
Ashton Irwin as himself
Calum Hood as himself
Zayn Malik as himself
Louis Tomlinson as himself
Niall Horan as himself
Liam Payne as himself
New characters
Sydney Hemmings, daughter of Harry and Luke Hemmings and older sister to Jacob
Jacob Hemmings, son of Harry and Luke Hemmings and younger brother to Sydney
Anne Styles-Clifford, daughter of Ariana Styles and Michael Clifford