Richard Branson claims his son got it on with Natalie Imbruglia

We wouldn’t like blabbermouth Richard Branson as our dad, as the multi-millionaire is guessing his son Sam may have lost his virginity to... pop star Natalie Imbruglia.

“He might have lost his virginity to Natalie, I’ve got a funny feeling.

But that was some years ago. And before she was married,” he said.

We’re sure Sam, 22, and ­Natalie, 33, will be pleased Branson was kind enough to offer us his insight.

But as Nat married in 2003, when Sam was 17, that would make him the luckiest teen in the world.

The Torn singer – who split from hubby Daniel Johns in January – canoodled with Sam at a bash at Kensington Roof Gardens in March.