Kill Bill star Daryl Hannah narrowly avoided being sold as a sex slave in Las Vegas in the late 1970s and is now coming forward with her seedy secret to help others forced into prostitution. The actress, who has joined forces with international human rights groups to help free sex slaves, reveals she was studying theatre in Los Angeles when she leaped at the chance to model for an album cover in Sin City. The 46-year-old told US crime show AMERICA'S MOST WANTED that she quickly realised the modelling trip was a scam and she was about to be forced into a sex-slave ring. Hannah told show host John Walsh she and another girl escaped out a window and fled back to Los Angeles, but she has always been haunted by the memory of how close she came to becoming forced into prostitution. And now the environmentalist and humanitarian is using her movie dollars to help those who weren't so lucky after learning there are more than 14,000 girls smuggled into America annually from Eastern Europe and Asia who become part of secret sex rings. She says, "The more I learn, the more I am moved to take action."