Matt LeBlanc is "besotted" with younger woman from Top Gear set

Matt LeBlanc has begun a "romance" with a woman who worked on the Top Gear set. Photo / Supplied

Former Friends starMatt LeBlanc is reportedly dating a woman 17 years his junior.

The 48-year-old is said to be "besotted" with Aurora Mulligan, who works as an assistant producer on TV show Top Gear, which Matt co-hosts alongside Chris Evans.

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The pair went public with their romance on Saturday as they enjoyed a date at a horse racing event in West Sussex, South England, and fellow racegoers say they couldn't keep their hands off each other.

An onlooker told The Sun: "Matt and Aurora were inseparable throughout the whole day. They were very tactile and Matt seemed to be very taken by Aurora as he laughed chatted intimately with her.

"Aurora just kept laughing at all his jokes and is clearly besotted with the American superstar. You wouldn't have known that they were work colleagues at all - it's definitely more than just a professional relationship."

Matt and Aurora were first linked with each other earlier this year, but his spokesman insisted it was a "strictly a work relationship".

However, a Top Gear source has reportedly confirmed that their friendship has now blossomed into something more serious.

The show insider revealed: "This has become a romance. Matt spends more time with Aurora than anyone else in the crew and there's definitely a blossoming relationship there."