Kevin Spacey is under investigation for two new sexual assault claims.
The alleged sexual assaults are said to have occurred in Westminster in 1996 and Gloucester in 2013.
Scotland Yard has not formally named the actor as the suspect. But it said they are investigating a man over two more claims.
These latest accusations bring the total number of claims against the Oscar winner to six – five complaints of sexual assault and one of assault.
Spacey was one of the first stars to be accused of sexual misconduct in the wake of the Harvey Weinstein scandal.
He has faced multiple accusations of sexual harassment since Star Trek actor Anthony Rapp claimed Spacey had made a sexual advance toward him in 1986, when he was 14 and Spacey was 26.
Responding to the initial historical allegation, the 58-year-old actor said he did "not remember the encounter" but offered "the sincerest apology" if it had taken place.
Spacey has since lost his House Of Cards Netflix role, been removed from Ridley Scott's 2017 film All The Money In The World, and had his 2017 Emmy Founders Award revoked.
He has not been arrested or charged with any crime.
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The Old Vic theatre in London – where Spacey was artistic director for over 10 years – also said they found 20 people who claimed to have suffered "inappropriate behaviour" from the actor.
Later this month, Spacey will make his first big-screen appearance since the allegations, in thriller Billionaire Boys Club, which was filmed two years ago.