At least he won't be recognised! Newly bald David Letterman looks grumpy as he goes shopping with wife Regina on St Barts

He is worth an estimated $400 million.

But that did not stop retired Late Show host David Letterman from looking distinctly grumpy as he went shopping for groceries with wife Regina on the Caribbean island of St Barts on Wednesday.

At least the recent retiree was in no danger of being recognized as he picked up essentials, thanks to his dramatic new bald-and-bearded look.

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Late Night? David Letterman looked grumpy as he went shopping with wife Regina on St Barts on Wednesday

Late Night? David Letterman looked grumpy as he went shopping with wife Regina on St Barts on Wednesday

The 68-year-old was looking great for his age in a white T-shirt, shorts and running shoes. His other half, the mother of his 12-year-old son Harry, opted for a laidback look of T-shirt and casual skirt.

The television star first started dating Regina in February 1986, while he was still in a long-term relationship with former Late Night producer Merrill Markoe.

Ironically just months after he married her in March 2009 he was the victim of a blackmail attempt by a man threatening to reveal he had had sex with several female employees.

Instead he contacted the police and. after a sting operation, 48 Hours producer Robert Halderman was arrested. He was later convicted.

Wait for me: Regina was trailing behind as the sprightly funnyman bounded ahead

Wait for me: Regina was trailing behind as the sprightly funnyman bounded ahead

Halderman had been in a relationship and shared a home with Dave's longtime personal assistant Stephanie Birkitt, who he had been having sex with.

Dave recently said he has not looked back since passing the Late Show baton on to its current incumbent, the viewer-starved Stephen Colbert.

He said: 'I thought I would have some trouble, some emotional trouble, or some feeling of displacement, but I realized, hey, that’s not my problem anymore.

Shortchanged? The late night legend looked his usual surly self as he left the shop with his groceries

Shortchanged? The late night legend looked his usual surly self as he left the shop with his groceries

'And I have felt much better. It’s something for younger men and women to take on.'

'I’ll be 69 next year and I’ve been doing this for 33 years. What did I want? Like you work until you’re a hundred? So there’s a lot of practical reasons why a person wouldn’t miss this.'

The comedian admitted that while presenting the show he did not realise just how insignificant his job really was, an impression no doubt reinforced by his revolving door of self-important celebrity guests. 

All he needs is the hat: The funnyman looked like an off-duty Captain Birdseye as he enjoyed his day out 

All he needs is the hat: The funnyman looked like an off-duty Captain Birdseye as he enjoyed his day out 

He said: 'And because of this introspection, you believe that what you are doing is of great importance and that it is affecting mankind wall-to-wall.

'And then when you get out of it you realize, oh, well, that wasn’t true at all,' he continued, laughing. 'It was just silliness. And when that occurred to me, I felt so much better and I realized, geez, I don’t think I care that much about television anymore.

'I feel foolish for having been misguided by my own ego for so many years.'

What a joker: The comedy genius stuck his tongue out as he larked around during a run on the island Tuesday

What a joker: The comedy genius stuck his tongue out as he larked around during a run on the island Tuesday

Geek chic: He became famous for his nerdy side-parting and clean-shaven look on the Late Show

Geek chic: He became famous for his nerdy side-parting and clean-shaven look on the Late Show

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