“I never look back at that scene,” Grint told People on Friday at Universal Orlando’s Celebration of Harry Potter event.
Grint has played down reports of a romance, despite spending nights with Nixon at her north London home He said: 'When I spoke to Pete Dohert's ex [rock singer Katie Lewis] at the NME awards, the next thing I knew I'm dating her [Nixon] according to the press.
'It doesn't make any sense to me.' Grint has a big 2009 planned, with the long-awaited sixth Harry Potter film due for release in July.
He is an unmarried but has been romantically involved with several Hollywood divas.
He dated Katie Lewis in the year 2004 but the most anticipated couple split up after a dating of 4 years.
But first he will see the release of indie film Cherrybomb next month.