Los Angeles, April 14 -- Katy Perry has denied serious allegations levelled by actress Ruby Rose about an alleged incident nearly two decades ago.

According to PEOPLE magazine, the controversy began when Ruby Rose posted on Threads on Sunday, accusing the singer of sexually assaulting her at a nightclub in Melbourne almost 20 years ago. Rose said she was in her early 20s at the time and that it had taken her years to speak publicly about it.

In a detailed post, Rose shared her version of events and said she had earlier spoken about the matter in a different way because she did not know how to deal with it at the time. She also claimed that she later stayed silent after Perry agreed to help her with a US visa.

"I was only in my early 20...