London police had earlier confirmed three other investigations against the Oscar-winning actor, bringing the total to six.
According to TMZ, one of the latest accusers came forward in April, claiming Spacey sexually assaulted him in Westminster in 1996. Scotland Yard had already been investigating Spacey on three other claims.
"Officers from the Child Abuse and Sexual Offences Command are investigating the allegations - including the one to have reportedly taken place in Gloucester", Metropolitan police told Radar exclusively in a statement. Spacey, now 58, said he did not remember the encounter but apologised for any "inappropriate drunken behaviour".
In a sneak peek for Andrew Denton's Interview program, Pearce claimed he had a "difficult time" with Spacey on set.
As a fun game, Denton began throwing out random names of actors Pearce has worked with, encouraging him to respond with his thoughts of his colleagues. "Slightly hard time with Kevin, yeah", Pearce said when asked about Spacey.
"Amazing actor, incredible actor", he said.
Rapp detailed an incident with Spacey in 1986, when he was only 14-years-old. "Thankfully I was 29 and not 14", he said.
In London, 20 allegations of inappropriate behavior by Spacey were unearthed during an investigation commissioned by officials at The Old Vic Theatre, where Spacey served as artistic director from 2004-15.
The Academy Award-winner, with his social media account, stated he had a "lot of respect and admiration for Anthony Rapp as an actor", but he was "horrified" to hear the allegations.
"Star Trek: Discovery" actor Anthony Rapp accused Spacey of sexual misconduct in October 2017.
He was sacked by Netflix's House Of Cards and Sir Ridley Scott erased him from his completed film All the Money in the World in reshoots costing millions. I have loved and had romantic relationships with men throughout my life, and I choose now to live as a gay man.