SYDNEY, Aug 3, 2007 (AFP) - The father of Oscar-nominated Hollywood actress Michelle Williams on Friday lost a round in his court battle to prevent US authorities extraditing him from Australia on tax evasion charges.

Stock market high-flyer Larry Williams, 64, whose daughter was nominated for a best supporting actress Oscar for her role in 'Brokeback Mountain' and is the fiance of Australian star Heath Ledger, was arrested in Sydney in May 2006.