Jack Whitehall says his dad Michael is constantly joking about the size of his ...

Their travels across the world have undoubtedly brought them closer together.

But Jack Whitehall, 32, has expressed frustration at his father Michael's constant jokes about the size of his manhood during their joint interview on The Sunday Project.

The British comedian claimed the 80-year-old was doing a 'great disservice' to him with his less than favourable remarks about his certain body part.

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'Great disservice to me!' Jack Whitehall, 32, has expressed frustration at his father Michael's constant jokes about the size of his manhood during their joint interview on The Sunday Project

'Great disservice to me!' Jack Whitehall, 32, has expressed frustration at his father Michael's constant jokes about the size of his manhood during their joint interview on The Sunday Project

Discussing the fourth season of Jack Whitehall: Travels with My Father, host Tommy Little asked: 'It's a family show for you guys, but were you surprised the amount of time your father brings up the size of your manhood?'

Jack responded: 'Yes, I am. I remain surprised, and it has become his favourite recurring joke, and there is no environment, no audience, that he will not try and talk about that in front of.

'He is doing me a great disservice, and it's all lies and fabrication and him having a dig.'

Michael bewilderingly replied: 'I think you're being very unfair. I'm just being honest!'

'It's all lies!' The British comedian claimed the 80-year-old was doing a 'great disservice' to him with his less than favourable remarks about his certain body part

'It's all lies!' The British comedian claimed the 80-year-old was doing a 'great disservice' to him with his less than favourable remarks about his certain body part

Michael bewilderingly replied: 'I think you're being very unfair. I'm just being honest!'

Michael bewilderingly replied: 'I think you're being very unfair. I'm just being honest!'

Elsewhere, Michael, who has begrudgingly involved himself in numerous customs and traditions across the globe, revealed one part of Australian culture proved to be his final straw.

The British TV producer revealed that he refused to drink goon while filming Down Under for the

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