United Kingdom, April 9 -- Superman star Valerie Perrine died after suffering sudden cardiac arrest.

The 82-year-old actress - who played Eve Teschmancher, the personal assistant and love interest of Lex Luthor, in the superhero films - passed away at her home in Beverly Hills, California last month and now it's been revealed her cause of death was listed as acute cardiopulmonary arrest with Parkinson's disease being listed as an underlying cause.

According to the death certificate, obtained by PEOPLE.com, dementia was also listed as a contributing factor.

After her death, Valerie's longtime partner, Stacey Souther, praised the actress for living her life "to the fullest" despite being diagnosed with Parkinson's disease in 2015.

Stace...