The 31-year-old has updated her Instagram to say 'wife of James Driskall'.
The Grease star's daughter has been with the martial arts expert since 2009. The couple became engaged in 2010.
Driskill has supported Lattanzi through a number of ups and downs, including her battle with anorexia.
'I think my fiance had a lot to do with helping me get through it,' she told Fox in 2015.
Recently, Lattanzi has been supporting her mum whose breast cancer has returned.
Newton-John first beat the disease 20 years ago before discovering earlier this year that the cancer had returned.
