The Harry Potter star followed Daniel Radcliffe and Eddie Redmayne in speaking out.
A judge awarded joint custody to a mother and father in Texas, US, despite their extremely different views regarding their child's gender identity.
The Mail on Sunday reported earlier this week that children in schools up and down the country are to be told to stop using the term ‘boys’ and ‘girls’. The guidance, being sent out to teachers, parents and pupils as young as seven, advises against the terms because of fears it discriminates against transgender children, leaving them feeling isolated. Instead children will be encouraged to use terms such as ‘genderqueer’ and ‘intersex’ by a new guidebook, which will be distributed to 120 schools around the UK next month.