Hammond held up her hand during a discussion about dating apps to show a green ring on her little finger.
She said: "More people are wanting to meet people out and about and having a green ring might be a good idea so that people know you're single.
"As you can see, I've got my single ring on."
She captioned the picture: "Girl therapy night ! Needed that.@hollywilloughby @emmaleebunton @shishib."
It has been reported that a 36-year-old man has been arrested on suspicion of blackmailing the TV star. It is alleged they threatened to release lies about Hammond unless she paid them.
In summer 2022 Hammond confirmed she was dating somebody.
“All I can say is he makes my heart sing and I feel content.”
“I am not engaged, I’m so sorry, I’m not engaged.”
Hammond found fame on the third series of Big Brother in 2002 before launching a successful TV career.
She has appeared on numerous reality shows including I'm A Celebrity... Get Me Out Of Here!, The Great Stand Up To Cancer Bake Off and Celebs Go Dating.
Hammond has been a presenter on This Morning for 20 years, often covering showbusiness news, and last year took over as a fulltime host on Fridays and the holidays with Dermot O’Leary.
Watch: Alison Hammond previously denied engagement rumours