In July, Spacey, 63, pleaded not guilty to five similar charges against three men between 2005 and 2013 in London and Gloucestershire, western England.
During the trial, Rapp, then 14, testified that Spacey, then 26, had invited him to his apartment for a party, then approached him in a bedroom after the other guests left.
In New York, trials are underway in sexual assault lawsuits against actor Kevin Spacey and screenwriter-director Paul Haggis, both Oscar winners. All of the men deny the allegations.
The incidents allegedly took place in London between March 2005 and August 2008, and one in western England in April 2013. The victims are now in their 30s and 40s.
Kevin would face charges of four counts of sexual assault against three men, and an additional charge of causing a person to engage in penetrative sexual activity without consent.
"The CPS has authorised criminal charges against Kevin Spacey, 62, for four counts of sexual assault against three men," said Rosemary Ainslie, Head of the CPS Special Crime Division.
According to US Weekly, more than 30 female actresses who are attending and or presenting at the 2018 Golden Globes have vowed to wear all black to this year's ceremony.
Hollywood actor Kevin Spacey, who is facing multiple allegations of sexual misconduct, has checked into a rehab centre in the Arizona desert to receive treatment for sex addiction.