Josie Gibson's appearance on I'm a Celebrity has revealed that she sucks her thumb aged 38 - but she is not the only star with the habit.
Madonna is proud to suck her thumb into her 60s, Rihanna only stopped at around 25 and incredibly one in ten British adults apparently does it in secret when tired or upset.
Ariana Grande, Victoria Beckham, Jennifer Lawrence, Geri Horner, Uma Thurman, Courtney Love and the late Amy Winehouse have also been photographed with a digit in their mouths.
Mother-of-one Ms Gibson was filmed drifting off to sleep in her jungle bed last night with the help of thumb-sucking, which has been described as a silent phenomenon.
Many I'm a Celeb viewers have criticised her, suggest that at the age of 38 and having a child of her own, she should have grown out of it. However, MailOnline can reveal that Josie is part of a much larger - and often secretive group of thumb suckers, including a host of the world's most famous names - and most of them women.
Madonna has been photographed at the age of 62 in the back of a bus in Malawi in 2021, but pictures of her doing it go back through the decades back to the 1980s. When she has been criticised, she once famously said: 'It’s MY life all of you women-hating bigots'.
Material Girl Madonna, pictured, sucks her thumb while on the back of a bus in an image she posted on Instagram
Rihanna sucks her thumb while sleeping on a coach in her mid-twenties
Jennifer Lawrence sucking her thumb at Heathrow in 2013 after jetting in for the BAFTAs
Victoria Beckham, pictured at Euro 2004, is also a famous thumb sucker
Ariana Grande shared this picture of herself sucking her thumb
The late Amy Winehouse sucked her thumb throughout her life, pictured here at Westminster Magistrates Court
In 2009 Amy Winehouse was spotted leaving her north London home with her bodyguard while sucking her thumb. A year later she did the same while cuddled up to her father Mitch Winehouse outside a party and also after a court case.
Victoria Beckham was photographed at an England match sucking her thumb when David was playing at Euro 2004 and also sucked her thumb for a Marc Jacobs campaign in 2008. Occasionally she has been seen with her thumb nail between her teeth.
Chloe Sims revealed that she had an overbite through sucking her thumb until the age of 16.
One in two children suck a thumb or finger at the age of one - and many will give it up by the age of four. One is eight will still do it in their teens.
But multiple surveys have suggested that up to one in ten adults do it - but most keep it secret from all but their loved-ones. The practice is so widespread that some dental practices say they refuse to treat them because of the damage it can do to teeth.
Dentists have said previously that adults who suck their thumbs regularly could need braces for up to 18 months because of the damage it can do to teeth.
Specialist orthodontist Dr Preet Bhogal said previously: 'Thumb sucking is a wholly negative activity for your teeth and jaws.
‘The thumb rests on the lower teeth, tilting them backwards, while proclining the top teeth forwards from behind.
‘The sucking exerts a negative pressure inside your mouth, narrowing the upper set of teeth and giving you an asymmetrical bite.’
Madonna sucking her thumb while snoozing with her youngest children in 2017
Megan Fox has often been pictured with a thumb in her mouth
Josie Gibson sucks her thumb as she drops off in the Australian jungle this week - and on Big Brother in 2010
Crazy: Josie Gibson, 38, left fans outraged after they quickly spotted her sucking on her thumb during Wednesday's episode of I'm A Celebrity
Many I'm a Celeb fans said they were disturbed when Josie Gibson was spotted her sucking on her thumb during Wednesday's episode of I'm A Celebrity.
The This Morning presenter, 38, was caught out while she was sleeping in camp and fans were quick to notice her habit.
Viewers rushed to X, formerly known as Twitter, to discuss her 'disgusting' and 'outrageous' habit that she has at her age.
Some wrote: 'Josie sucking her thumb wtf'.
'Guys did I just see Josie sucking her thumb or did I imagine it?'
'Sorry is Josie sucking her thumb?'
'Is Josie sucking on her thumb while sleeping? Omg people grew out of that in childhood'.
'Josie Gibson sucking her thumb? How old is she!!'
'Nah I can't move past Josie sucking her thumb? What grown woman does that OMG'.
'I don't care how popular she is, seeing Josie sucking her thumb like a baby is quite disturbing'.