The twins were born in London. Their mother is a make-up artist, and their father is an art director. Cloe is one minute older than Holly. They have two older brothers, Rory and Billy  and their sisters are Zoe Lia Mackie 21, Marianna Louise Mackie 16 and Aimee Megara Mackie 14.
They attend school in north London and attend Sylvia Young Theatre School on Saturdays. They both went to Kentish Town Church of England Primary School and reception year at Yerbury Primary School.
- Home Grown (2006) short film -Zoe
- Wednesday (2006) short film - young Lilya
- Death Defying Acts (2007) feature Film - Psychic Twin One
- St Trinian's (2007) feature film - Tania
- St. Trinian's II: The Legend of Fritton's Gold (2009) feature Film - Tania
- Coven (2013) feature film - Cara