Fugitive actor Randy Quaid has claimed Perth star Heath Ledger was one of many celebrities "whacked" by a group of Hollywood criminals from whom he is now on the run.

Quaid and his wife Evi are seeking refugee status in Canada after fleeing over the border from the United States, claiming their lives were at risk.

The actor, who played a supporting role alongside Ledger in the Oscar-winning film Brokeback Mountain, said he was being hunted by a gang of Hollywood "star-whackers" who already had a long list of celebrity victims.

"Up until a year ago Evi and I had never had any run-in with the law whatsoever," he said.