Actress Renee Zellweger has brushed off reports she's dating Uma Thurman's hotelier ex Andre Balazs.Zellweger fuelled speculation she was romantically involved with Balazs after the pair was spotted enjoying a recent dinner together in Manhattan, New York.But a spokesperson has shot back at the claims, insisting Zellweger and Balazs are not romantically involved.Zellweger's representative tells People magazine: "Renee is single and not dating anyone."Thurman and Balazs split in 2006 after two years together. Earlier this year, the actress became engaged to Swiss businessman Arpad 'Arki' Busson.

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