Robbie Williams has been getting into shape ahead of fatherhood flexes his muscles in topless Twitter snap

Big daddy! Father-to-be Robbie Williams flexes his muscles in topless snap

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UPDATED:

12:11 GMT, 15 August 2012

He's eagerly awaiting the arrival of his first child with wife Ayda.

And it appears that Robbie Williams has been hitting the gym hard in the run up to becoming a father.

The Take That singer posted a topless snap of himself flexing his muscles.

Buff body: Robbie Williams tweeted a topless snap of himself showing off his muscles

Buff body: Robbie Williams tweeted a topless snap of himself showing off his muscles

Robbie has clearly undergone a gruelling workout regime to develop such impressive biceps, abs and chest muscles.

As well as showing off his rock hard shape the snap also highlighted the singer's extensive body art.

Robbie is expecting the arrival of his first child any day now and he didn't appear with the rest of Take That at the Olympics closing ceremony because he wanted to be with wife Ayda.

Ahead of the concert a spokesperson for Robbie told MailOnline:'They were initial discussions but he just can't do it because his wife is about to give birth.'

Waiting for their new arrival: Robbie and Ayda are expecting their first child any day now

Waiting for their new arrival: Robbie and Ayda are expecting their first child any day now

Not so in shape: Robbie hasn't always been in such toned shape

Not so in shape: Robbie hasn't always been in such toned shape

Robbie revealed he and wife Ayda were expecting a baby back in March and it's clear he can't wait to meet his daughter.

The singer recently tweeted a picture of his wife showing off her growing baby bump with the caption: 'My two girls!'

Robbie's band mate Gary Barlow suffered a personal tragedy earlier this month when his daughter Poppy was stillborn.

The heartbreak came just days after Mark Owen welcomed his third child daughter Fox India.