Sandra Bullock has "got everyone talking" after spending time with Ryan Reynolds' close friend.

Sandra has been romantically linked to Ryan several times, but the pair have always insisted they are just good friends. The Oscar-winning actress has now sparked new relationship rumours after being spotted with movie producer Jonathon Komack Martin.

Those close to Sandra are hoping she has found love again following the breakdown of her marriage to Jesse James in 2010.

"Sandra and Jonathon are great friends," an insider told the US edition of OK! magazine. "They were introduced years ago and they've always hit it off. She's been spending more time and more time with him, going to parties or just hanging out, and that's got everyone talking."

The pair were seen arriving together at a party in Los Angeles last month and were inseparable throughout the day.

"Jonathon was very attentive to Sandra," a source added. "He didn't leave her side all afternoon."

Sandra's friends have reportedly attempted to get her to open up about her feelings for Jonathon. However, the 47-year-old star is refusing to reveal if she wants a romance to develop.

"She's being extremely secretive, though, which is typical. And given what she's been through, you can hardly blame her," the insider added. "Even when probed, she won't reveal much more than saying what a great guy Jonathon is."