United Kingdom, July 18 -- Crystal Hefner has applied to change her name.

The 39-year-old model - who got engaged to James Ward earlier this year - has officially petitioned to revert back to Crystal Margaret Harris, using the surname she had before marrying late Playboy tycoon Hugh Hefner in 2012.

Court documents on the matter obtained by People magazine didn't list a hearing date but in California, legal name changes typically require a public notice period and a formal court hearing before they can be carried out.

Crystal previously claimed she only loved Hugh - who died in 2017 aged 91 - like an elderly relative.

She wrote in her memoir 'Only Say Good Things: Surviving Playboy and Finding Myself': "Life in the (Playboy) mansion wa...