Hillary Clinton looked wonderfully youthful at an event on Broadway in New York last night - and aesthetic experts suggest it could be down to regular 'tweakments' and cosmetic procedures.

The radiant former First Lady, 72, showed off a wrinkle-free complexion and plumped-up cheeks as she joined her husband Bill behind the scenes of Ain't Too Proud: The Temptations Musical at The Imperial Theatre.

Sporting a vibrant pink tunic dress with black trousers and a statement gold necklace, Chicago-born Hillary smiled as she chatted and posed with the cast.

Her glowing skin was noticeably smoother and her cheeks more defined than earlier in the week, when she spoke at the Jewish Labor Committee's Annual Human Rights Awards Dinner in the city on Monday.

Aesthetic expert Dr Ross Perry, founder of www.cosmedics.co.uk, said Hillary has been 'genetically blessed' with good skin - but claimed it could also be a result of Botox, injectable dermal fillers and Blepharoplasty.

The radiant former First Lady, 72, showed off a wrinkle-free complexion as she joined her husband Bill behind the scenes of Ain't Too Proud: The Temptations Musical at The Imperial Theatre

Yesterday Hillary's skin was noticeably smoother and her cheeks more defined than earlier in the week, when she spoke at the Jewish Labor Committee's Annual Human Rights Awards Dinner in the city on Monday (pictured)

He told FEMAIL: 'Hilary Clinton looks fantastic and I would suggest this is down to regular tweakments and procedures over the years, which appears less noticeable than having dramatic work done all in one go.

'Her forehead looks particularly smooth, which would suggest Botox has been administered in the forehead, frown line and around the eye area, as there appears to be minimal crows feet.

'For someone of 72, I'd expect to see a more furrowed brow with extensive creasing and lines around the eyes.'

Dr Perry added that he suspects Hillary may have had Blepharoplasty, a procedure in which excess skin above the eye is removed.

According to aesthetic expert Dr Ross Perry, founder of CosmedicsUK, the politician's youthful appearance is down to 'regular tweakments and procedures' over the years

Dr Perry suggested Hillary's forehead looks particularly smooth, which would suggest Botox has been administered in the forehead, frown line and around the eye area. Pictured with her husband Bill last night

'Around the eye area again looks incredibly youthful, and as we age the skin around our eyes tends to become loose and wrinkled, making the eyes appear tired-looking,' he said.

'I would suspect Hilary may well have had Blepharoplasty which removes crepey, excess skin from above the eye which causes hooding and develops as we age.

'I would suggest she's also had this to target the under eye bags and to smooth further wrinkles from the corners of her eyes.'

Dr Perry added he believes it's 'likely Hillary (pictured last night) has had some help with the use of injectable dermal wrinkle injections'

Despite her advancing years, Hillary's face has remained relatively full-looking, which Dr Perry said helps with the ageing process.

He added: 'I'd say it's also likely Hillary has had some help with the use of injectable dermal wrinkle injections.

'These tiny little injections work very simply by adding extra volume into the skin to fill out lines or creases, with the latest generation of deep fillers especially designed for use in larger areas, such as hollows that can appear below the eyes or in the cheek.

'As we can see in recent pictures, the cheek area looks full and rounded, which gives a more youthful appearance.'

'For someone of 72, I'd expect to see a more furrowed brow with extensive creasing and lines around the eyes,' said Dr Perry of Hillary, pictured during her appearance on the Graham Norton show in November

Aesthetic practitioner Dr Judy Todd, who runs the Synergy Clinic in Glasgow and London, added: 'There also appears to be slightly more volume in the lips which could also be from a filler.'

It's not the first time Hillary's young-looking complexion has come under scrutiny.

During her 2016 presidential campaign there was speculation she'd had cosmetic surgery, while journalist Edward Klein claimed in his 2015 book Unlikeable: The Problem with Hillary that her husband 'wanted her to get a face-lift'.

He wrote: 'She couldn't do anything about the calendar — she'd be 69 years old in 2016 — but she could do something about the lines and sagging skin on her face.'

Klein added that a cosmetic surgeon set up a discreet 'mini operating room' in her Chappaqua home 'with the latest medical equipment' - though he didn't cite any evidence.

During her presidential campaign there was speculation Hillary (pictured left in Iowa and right in Washington in October 2016) had cosmetic surgery

'She had her cheeks lifted and her wrinkles and lines Botoxed... She had work done on her eyes as well as on her neck and forehead,' he wrote.

He went on to quote one of Hillary's friends, who claimed: 'She took it gradually and didn't have anything drastic done, because she wanted to evaluate the changes as she proceeded.

'If it had started to make her look weird, she would have stopped it immediately. It was a pretty big deal and required multiple visits.'

Hillary's spokesperson Nick Merrill said of Klein's book: 'Someone should do a book about Ed. They could call it "Bulls**t: The Problem With Anything Ed Klein Writes".'

FEMAIL has reached out to the Clinton Foundation for comment.