We know the inhabitants of celebville like to look their best but we didn't have impressionist Alistair McGowan down as the type who would fret about losing his hair.

He has sparked speculation he has had a hair transplant after sporting a suspiciously thicker thatch of late.

The former 'Big Impressions' star's hair has been thinning of late but he looked like he'd left one of his characters wigs on as he attended a photocall earlier this week.

alistair mcgowan hair transplant

His head looked a lot fuller than it did back in 2010, when he was a lot thinner on top.

Alistair wouldn't be the first male celeb to have a hair transplant though.

Jason Gardiner and James Nesbitt have previously undergone the surgery, along with many other stars...

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  • Hair Transplants - John Travolta

    John Travolta<br>The list of things that John Travolta isn't admitting to seems to grow longer by the day.We don't give a fig about his sexuality, but we do find it rather surprising that he won't 'fess up to having had a bit of a helping hand with his hair - because for years he's been regarded as having the least-convincing hairline in Hollywood.If only they were making Lego: The Movie he'd be a dead cert for the lead role. (credit: PA)

  • Hair Transplants - Bono

    Bono<br>Bono has always seemed to us to be someone with a rather high opinion of himself, so it comes as no surprise to discover that he's also stayed schtum about his barnet.The U2 frontman was clearly thinning by the late '80s though, but throughout the '90s and '00s his hair seemed to move in Mysterious Ways - increasing in density as it decreased in length.He obviously takes Pride (in the name of) his hair though, so we'll draw a (hair) line under the matter right here. (credit: PA)

  • Hair Transplants - Declan Donnelly

    Declan Donnelly<br>First we want to make it clear that the density of Dec's hair is something we'd never even considered until it was brought to our attention.But once we were made aware of an alleged increase in bushiness, we had to admit that something fishy did appear to be going on.Now we're not saying he's definitely had a transplant (and he's certainly keeping mum), but have a look at these pics and see what you reckon. (credit: PA)

  • Hair Transplants - Sir Elton John

    Sir Elton John<br>The artist formerly known as Reg Dwight started to lose his hair way back in the 1970s, and was one of the first celebs to undergo a hair transplant.The change was so dramatic - and he was so mega-famous back then - that he had to be honest about having had it done.We don't know how much work he's had done up there since, but he's got more hair than Marge Simpson these days. (credit: PA)

  • Hair Transplants - Jude Law

    Jude Law<br>Has he or hasn't he? That is the question when it comes to the talented Mr Law.Jude is famous for his sneaky mini-combover, as shown in the right hand picture - but there have been persistent rumours that he's also had a transplant.He's never spoken out about it, and definitive evdience is hard to come by - so for now it will have to remain a mystery, my dear Watson. (credit: PA)

  • Hair Transplants - James Nesbitt

    James Nesbitt<br>He might still be best known to many of us for his role in Cold Feet, but it was obviously James Nesbitt's head that was getting a bit chilly.The actor has been upfront about having undergone two hair transplant procedures - and says the results have changed his life.Will we see the suave Northern Irishman becoming the latest Brit to make it big across the pond thanks to his new thatch? (credit: PA)

  • Hair Transplants - Rob Brydon

    Rob Brydon<br>Comedian Rob Brydon is another famous face who appears to have had a bit of re-thatching carried out on his rooftop.The Welshman hasn't explicitly confirmed that he's had a transplant, but did say: "For some time now my head has been feeling a lot warmer but I was unable to put my finger on the reason why."He might not be able to, but it looks like one of his co-stars isn't having any problems doing so in the right-hand photo here. (credit: PA)

  • Hair Transplants - Ronan Keating

    Ronan Keating<br>Boyzone star Ronan Keating was also an enthusiastic mini-combover man back in the 1990s, but sometime in the early noughties his hairline seemed to move forward a little.The change may be hardly noticeable, but that's how it should be when it's done right.We take our hats off to one of the best barnets in the business! (credit: PA)

  • Hair Transplants - Duncan Bannatyne

    Duncan Bannatyne<br>Not only has Dragon's Den tycoon Duncan Bannatyne's mop got darker in recent years, but his hairline has also moved forward.The gym chain owner has admitted having a transplant, in which a piece of skin is taken from the back of the scalp, cut into 1mm pieces and placed in balding areas.Apparently it's not as painful as it sounds and he's delighted with the results.(credit: PA)

  • Hair Transplants - Shaun Williamson

    Shaun Williamson<br>The man who used to play Barry Evans in EastEnders has never even tried to pretend that his hair grew back overnight - which is just as well because nobody would have believed him.He even told Ricky Gervais and Stephen Merchant about the op, so they could use it to mock him when he appeared in their Extras (although the gags got cut).We think it looks pretty good actually, and it's better than looking like Keith Allen - as he was beginning to in the left-hand picture here. (credit: PA)

  • Hair Transplants - Alistair McGowan