Kirstie, 41, revealed that the encounter with the Broadchurch star occurred while they posed for a picture together.
Kirstie says: ‘I had my photo taken with the gorgeous David Tennant and he asked if we could take it again because he didn’t feel the first snap did my beauty justice. Could that be considered flirting?’
But despite once being named the 91st sexiest woman in the world, the property guru insists that she never gets chatted up by fellow celebrities. Kirstie revealed: ‘I don’t think a celebrity has ever hit on me, no! Anyway, I’m happily married!’
We bet her husband Ben is happy to hear it!
To read Kirstie’s tips on upcycling and saving money, click here