The 30-year-old singer was arrested on 2 December (16), the morning after performing at the Gorgeous nightclub in Wolverhampton, England, after a 20-year-old woman claimed she had been raped and sexually assaulted.
The woman allegedly told the police officers she went back to the singer's hotel with a friend and enjoyed some drinks with him and a male pal. After she left, she realised she had left her bag and money and she claims she was raped upon her return to the hotel.
After she reported the alleged incident to the police, Williams was arrested at the hotel on suspicion of rape and his 29-year-old friend on suspicion of sexual assault. They have been bailed until February (17) pending further enquiries.
Representatives from his management 10 Worlds Music have now issued a statement to deny the claims.
"All we wish to say at this time is that Oritse denies the allegations against him," they said. "The matter is in the hands of the police and it would be totally wrong for us to comment any further."
Williams found fame with JLS on Britain's The X Factor in 2008, with the boy band splitting three years ago.