The Sky News anchor went under the knife again, having previously had work done after turning 40. The Mirror reports that experts believe Burley has had a 'subtle procedure' to avoid making the work look obvious.
"It looks like she's had some tightening along the jawline to redefine it and make it look less slack," surgeon Alex Karidis is quoted as saying. "There was a slight jowl before, but that's softened and much more clean. Also, the nose to mouth lines are not as evident now.
"But that could be injectable fillers. The collagen content decreases when we get older and the lips can thin out, so you can get fillers put in. But the before- and after-pictures are not going to be that dramatically different, because she obviously wouldn't want to draw attention."
Speaking about past surgery, Burley previously admitted to having the lines under her eyes reduced, saying: "My make-up girls were finding it difficult to cover them up so I thought, 'Let's work this out'. They took the fat out and it won't ever come back. It's fantastic."
She also insisted that she was not worried about losing her position on Sky to a younger colleague.
"It was nothing to do with my career," she said. "As long as you can identify with who's reading the news it doesn't matter if they're 22 or 52."
However, Burley's alleged facelift has been criticised by former GMTV host Fiona Phillips.
"If holding back the years rocks Kay's boat that's her business," the presenter said. "But as she was voted 'most desirable' presenter on satellite for three years on the trot, I reckon she's unnecessarily worried over her boat race.
"Kay's a former colleague of mine and a brilliant professional whose beauty lights up the screen. Trouble is, I don't think she feels the same about herself."
Phillips added: "Someone needs to tell gorgeous Kay that she shouldn't pander to the opinion that older women should be heard but not seen."
> Kay Burley dismisses "relaxed" protester