Carrie Fisher had cocaine and ecstasy in her system when she died

Los Angeles  - Carrie Fisher had a cocktail of drugs including cocaine and ecstasy in her system when she suffered a fatal mid-air heart attack, a coroner's report revealed Monday.

The Star Wars actress - who catapulted to stardom as the space epic's rebel warrior Princess Leia - was rushed to hospital in Los Angeles on 23 December after collapsing on a flight from London and was pronounced dead four days later.

There were quantities of alcohol and opiates in her system, according to the toxicology report, which suggested "exposure to heroin, but that the dose and time of exposure cannot be pinpointed."

Tests revealed the cocaine would have been taken within the previous three days, according to the report, which gave the cause of death as sleep apnoea - a breathing disorder - and "other undetermined factors" including heart disease and "multiple drug intake."

They also showed "remote exposure" to the recreational drug MDMA, better known in its pill form as ecstasy.

A press release from the coroner's office on Friday indicated that drugs were found in 60-year-old Fisher's system, but it did not go into detail.

"Ms. Fisher suffered what appeared to be a cardiac arrest on the airplane, accompanied by vomiting and with a history of sleep apnoea," the final report stated.

"Based on the available toxicological information, we cannot establish the significance of the multiple substances that were detected in Ms. Fisher's blood and tissue, with regard to the cause of death."

Fisher's daughter, Billie Lourd, said in a statement released to celebrity magazine People on Friday her mother had "battled drug addiction and mental illness her entire life" and "ultimately died of it."