Harries, who shot to fame in the 1980s as a child star and TV antiques expert, claimed she romped with Brand back in 2006 after they met on a UK show he was hosting.
Chatting about their fling, Harries was said to have told Britain's Daily Star, "I felt a surge of electricity. I had sex with Russell."
Brand has now taken to his Twitter page to share his side of the story, admitting he has slept with many women in the past but Harries was not one of them.