Robbie Williams is to become a father for the first time.

The Take That star has announced he is expecting a child with his wife Ayda Field. Robbie took to his blog to tell fans his news, choosing to do so in an unusual manner.

"Hey friendlies , I've been keeping a secret from you allme and Ayda are going to be mummy and daddy this year !!!!!!!!!!!!!!!!!!!!!!!!!!!

"We had sex! It works (sic)!" he wrote.

The 38-year-old musician added the whole experience has been an emotional one. He and the actress have already had a scan and Robbie can't wait to meet the tot.

"We've seen scans and cried.

Looked at babies in commercials and teared up..

The nursery is already planned. Basically i'm in love with a little person growing in mummy's belly. (sic)," he wrote.

Robbie added that he can't believe how excited he is at the prospect of becoming a father. He ended the post by telling fans he had to sign off as he was crying just thinking about the new arrival.

Robbie and Ayda got married in August 2010, in a lavish ceremony at the singer's home in Los Angeles.