TV and radio star Graham Norton fears scammers will target his followers after his Twitter account was hacked.
He deleted his account @grahnort last year but has now warned that the old page has been reactivated by an impersonator.
Graham urged his more than 600,000 followers to spread the word that he is not behind the account — despite it still having a blue verified tick.
The Eurovision host, 60, wrote on Instagram: “I’ve just been told someone has reactivated my Twitter account.
“I’m now locked out of it.
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“My worry is that whoever has access may try sending DMs asking for money or donations.
“Please spread the word that it is not me even though it still has a blue tick.”
The BBC TV and Virgin Radio presenter’s alert comes amid confusion over changes made by new Twitter owner Elon Musk.
Twitter failed to take legacy blue checkmarks off the social media platform, having committed to remove them on April 1.
Concerns over verification have risen since blue checkmarks became a paid feature — costing users eight US dollars (£6.40) a month for a Twitter Blue subscription.
Several celebrities have recently shared examples of fake Twitter profiles impersonating them.