Birth Name: Thomasin McKenzie
Date of Birth: July 26, 2000
Place of Birth: Wellington, New Zealand
Height: 5′ 5″ (1,65 m)
From IMDB:
Granddaughter of actress Kate Harcourt and Peter Harcourt. Peter was from the family that founded real estate company Harcourts International. Daughter of actress Miranda Harcourt and director Stuart McKenzie. Niece of presenter Gordon Harcourt.