She explains, "Woody introduced me to Paul at the beginning of 2009. We went to dinner at his house. Then I wrote him a letter later in the year and he drew three different drawings of blackbird feet on the (reply) letter and my mom, my dad, my brother and I all have it tattooed on our wrist.
"My dad and I have it on our left wrists and my mom and my brother have it on their right wrists. It's pretty cool.
"I look at it every day. Every time he sees it, he touches it and at the BAFTAs, he kissed it. He's the greatest guy."
And now it's her turn to introduce McCartney to her celebrity friends - she took Crazy Stupid Love co-star Ryan Gosling to see the rocker at the Yankee Stadium in New York on Saturday night (16Jul11).
Stone tells BlogTalkRadio.com, "I've seen him multiple times and Ryan and I went to the concert the other night and we got to go backstage and hang out with Paul McCartney and the tiny harmonica that he hides in his pocket. It was really great. The whole thing is surreal."