Robbie and Ayda are celebrating

Robbie Williams is expecting his first child with wife Ayda Field.

The pop star, who lives in LA, announced the exciting news via a blog on his website.

‘Hey friendlies,’ wrote Robbie, 38.

‘I’ve been keeping a secret from you all… me and Ayda are going to be mummy and daddy this year…!!!!!!!!!!!!!!!!!!!!!!!!!!!

‘We had sex! It works!’

Robbie married American actress Ayda, 32, in August 2010 and recently revealed that they were keen to start a family.

‘We’ve seen scans and cried… looked at babies in commercials and teared up… the nursery is already planned…’ Robbie continued on his blog.

‘Basically I’m in love with a little person growing in mummy’s belly…

‘And can’t wait to be a daddy… crying now…

‘Much love much joy, Roberto, Mum and Little Bump xxxxxx.’

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Esme Riley