The Welsh singer is said to have met Adam Bidwell through mutual friends in London several weeks ago, reports the Daily Mail.
Sales manager Bidwell is thought to be the first man she has been serious with since her split from Gethin Jones last year.
"This is the first guy since Gethin who Katherine has gone out with, so she is taking it slow," a friend said.
"They obviously share a mutual love of rugby, as Adam used to play for London Wasps and she's the Welsh team's mascot and has sung at lots of games. She is really excited to see where it leads."
Katherine Jenkins with ex-partner Gethin Jones
Bidwell was previously photographed with Prince Harry in a Jacuzzi in Las Vegas last year.
"Katherine knows Adam likes to have fun and all about his party past, but they have lots of other things in common like food, travel and music," added the friend.
Katherine Jenkins publicly denied reports that she had an affair with David Beckham last year.
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