The pair spent a few hours at Paul's London home on Sunday before the former Beatle escorted Rosanna to a friend's home. Of their goodbyes, an onlooker told the News of the World, "It was all cloak-and-dagger stuff, but Paul couldn't resist a quick cuddle. Rosanna was beaming after that."

About 12 hours later Paul and Rosanna met up again to go to Kenwood House, a mansion with grounds open to the public. NOTW claims Rosanna spent much of the afternoon laughing at Paul's jokes. A witness to the outing said, "They acted like teenagers on a first date. The body language said it all—they were almost joined at the hip."

Another observer added, "Paul looked very flirty. They had a couple of cuddles and a kiss. The sparks were there for everyone to see."

When asked about the date by People magazine, McCartney's rep had no comment.