The former Dancing with the Stars contestant took to Twitter to categorically dismiss allegations that she was ever in a romance with Beckham.
"Dear Twitter friends, I've read some horrible rumours on here & want u 2 know I absolutely deny I've had an affair with David Beckham," Jenkins tweeted.
Her statement continued: "The rumours are very hurtful, untrue & my lawyers tell me actionable. I've only met David twice: once at the Military Awards in 2010 & on a night out in the West End in Feb 2012.
"We were out in a group of friends & it was just a normal fun evening out. Just so we are clear I have never been on my own with him and never arranged to meet up."
The Beckhams are yet to publicly respond to the rumours.
Earlier this week, Jenkins dismissed reports
Jenkins's spokesperson has insisted that the pair were "just being friendly" while spending time together at the concert series.
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Watch Katherine Jenkins's 'Break It to My Heart' music video below: