The woman blacked out during an acting exercise and awoke partially undressed, according to the lawsuit brought under a New York law.
The lawsuit filed in Nevada alleges the former "Cosby Show" star used what they call his “enormous power, fame and prestige” to victimize them.
Victoria Valentino is suing the comedian under a new California law temporarily lifting the statute of limitations on such cases.
The woman said the alleged assault came after she had met Cosby in New York and he promised to help her career.
"I feel that I will be able to perform and be the Bill Cosby that my audience knows me to be,” the disgraced comedian said.
Jurors found that the comedian intentionally caused harmful sexual contact with Judy Huth, now 64, and awarded her $500,000.
Bill Cosby, who was freed from prison nearly a year ago, is facing sex abuse allegations again.
The 85-year-old comedian, who was freed from prison 11 months ago, is accused of forcing a teenager to perform a sex act at the Playboy Mansion in 1975.
Bill Cosby will walk free after Pennsylvania’s highest court ruled he should not have been prosecuted for sexual assault in 2018.
The high court declined prosecutors' request to hear the case and reinstate Cosby's sexual assault conviction.