What a difference a day makes.

Today Show host Karl Stefanovic looked he might have had too much fun the night before as he hit New York's streets with Jessica Hart, 29, on Wednesday.

The TV star, 40, who known for his love of high jinx, spent the previous night enjoying New York's nightlife with Jess, her model sister Ashley, and 60 Minutes producer, Steven Burling.

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The morning after the night before: Karl Stefanovic appears to be nursing a sore head as he walks next to pristine model Jessica Hart after pair's raucous night out on Tuesday

Big night? The Today host, 40, who known for his love of high jinx, spent Tuesday night enjoying New York's nightlife with Jess (R) and her model sister Ashley (L), and 60 Minutes producer, Steven Burling

Emerging the next day it looked as if the married breakfast show host might have been suffering the after-affects of some over indulgence.

Even the Australian presenter's smart attire couldn't distract from his pained expression while by contrast perfectly groomed Jessica looked unflinchingly fresh.

The open shirt he had sported the night before had been replaced by a neat navy outfit.

Feeling it: The well loved presenter appeared to be sans the spring in his step as he kept his eyes down

Brow beaten: The father-of-three was visibly winching as he strolled along in a pair of moccasin boots

As the bright sun bore down upon him, the father-of-three kept his eyes down, his gaze grazing the sidewalk.

At one point he appeared to be visibly wincing as he strode along in his moccasin brown boots. And it was all that Karl could do to keep up with Jess's catwalk sized steps.

The leggy blonde floated along the sidewalk dressed in a bright red silk shirt, showing off her gazelle-like pins in white jeans and over-the-knee black boots.

How does she do it? The 29-year-old cover girl looked as flawless as ever in a pair of white jeans and silk shirt

Partners in crime! Karl is in the States for work and interviewed the model for The Today show

Her golden blonde locks sashayed around her shoulders as she strode along looking fresh-faced and fabulous, but hid her eyes behind a pair of sunglasses.

The Sydney-born beauty flashed her trademark gap-toothed grin.

Breakfast show host Karl is in the US for work and interviewed the Australian model and her sister Ashley as part of a segment for Today show.

Jess's sister Ashley celebrated Sydneysider Karl's arrival in New York with an Instagram of them partying together – testifying to the fun loving nature of their evening.

'What a night!!!! #NYC 60 minutes with these legends would never be long enough.. #friendsForLife! Thank you touching these #Harts and allowing them to express. @1jessicahart #family #love #grateful,' wrote the yoga-loving blonde.

Old friends! The playful presenter was guffawing in the short of the pair partying the night before

Karl, whose seat on Today is being kept warm by David Campbell while he works in NYC, is known for seizing opportunities to let his hair down in between interviewing celebrities and appearing on Channel Nine.

At the 2009 Logies he appeared rosy-cheeked, slurring his words and frequently giggling.

'It wasn't any different to any other year — we all get smashed at the Logies and go to work the next day; we'd done it for years and years,' he told news.com.au.

'But this was the first Logies when stuff really started working on the internet,' he said.