Cathriona White's official cause of death is still unknown.
According to the death certificate forJim Carrey's late girlfriend, the cause of death is being deferred, pending the investigation. Assistant Chief Coroner Ed Winter told ET late last month that there were pills located next to the 30-year-old hair and makeup artist, when her body was found at her Sherman Oaks, California residence.
The death certificate also confirms that White was married at the time of her death to a man named Mark Burton. According to records in Clark County, Nevada, White and Burton married on Jan. 14, 2013. A source told ET earlier this month that White was planning on starting divorce proceedings in December.
EXCLUSIVE: Jim Carrey and Cathriona White 'Looked Really Happy' on Their Final Date Together
"As far as Jim was concerned, Cat was separated from her husband," the source said. "He would never have been out publicly with her if she was still with her husband and still married."
Carrey actually attended White's funeral last Saturday in her hometown of Ireland. The 53-year-old actor was a pallbearer during the mass at Our Lady of Fatima Church in the village of Cappawhite in County Tiperrary, which approximately 200 people attended. According to an eyewitness, Carrey seemed very emotional as he helped carry White's casket.
Carrey and White had been dating on and off since 2012.
White was found dead of an apparent suicide in her residence on Sept. 28. Several notes were found at the scene, including one addressed to Carrey.
"I am shocked and deeply saddened by the passing of my sweet Cathriona," Carrey said in a statement to ET last month. "She was a truly kind and delicate Irish flower, too sensitive for this soil, to whom loving and being loved was all that sparkled. My heart goes out to her family and friends and to everyone who loved and cared about her. We have all been hit with a lightning bolt."
WATCH: Cathriona White ''Addressed' a Note to Jim Carrey Before Apparent Suicide, Coroner Says
Watch the video below for more on White's funeral.