Robbie Williams and his wife are going to have a son.

The 'Candy' hitmaker's partner Ayda Field is pregnant with their second child, and it is said the couple are now expecting to give daughter Theodora Rose, two, a brother.

A source told the Daily Star Sunday newspaper: ''Robbie is expecting a boy and is over the moon.

''They went for scans recently when they were in LA and once again got the doctor to put the sex of their baby in an envelope so they could take it away and open it later.

''They went out for dinner and opened it after dessert.''

The singer has admitted in the past he wanted a baby boy, and it is said both he and Ayda are ''thrilled'' at the news.

The insider added: ''Both Robbie and Ayda are thrilled. Robbie wasn't shy about telling the world he wanted a son and now they are expecting one.''

Robbie first announce the happy news he and his wife were expecting their second child back in April.

Taking to Twitter, he wrote at the time: ''Ayda and I are delighted to announce that Theodora Rose Williams is going to be a big sister. RW xxx''