Steve Granitz / WireImage 1 / 5
Steve Granitz / WireImage 1 / 5

Sandra Bullock has spoken out to clear up rumors she is dating newly-single Ryan Reynolds, insisting the actor has been an "amazing friend" to her over the last 10 years.

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The Oscar-winner divorced her husband Jesse James last year after reports of his infidelity hit the headlines, while her "Proposal" co-star Reynolds split from wife Scarlett Johansson last month.

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The stars have been spotted spending time together as they both cope with their marriage breakdowns, prompting flurries of rumors suggesting they are more than just friends.

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Bullock has now spoken out to silence the gossip for good, telling the "Today" show, "I think there will be a collective sigh [of relief] amongst women across the United States when I say he's not my lover. He's just an amazing friend for 10 years ... but I don't get his loving after dark."