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Hollywood actor Josh Hartnett has denied any romantic attachment after a weekend in Sydney with New Zealand actress Amber Sainsbury, the Daily Telegraph reports.
It says Sainsbury has a small role in the thriller Hartnett, 28, is shooting in Auckland, 30 Days of Night.
Hartnett's friendly behaviour with his 26-year-old co-star has fuelled speculation the star of Pearl Harbor and Black Hawk Down is going through a rocky patch in his relationship with screen siren Scarlett Johansson.
Sainsbury made her acting debut at just 15 in the New Zealand television drama Plainclothes.
