Nadine Coyle has got engaged.

The former Girls Aloud star's partner Jason Bell is said to have proposed over Christmas and the couple - who are expecting a baby girl next month - ''can't wait'' to plan their wedding once they have become parents.

A source told The Sun on Sunday newspaper: ''Nadine is on cloud nine after Jason went down on one knee over Christmas and proposed.

''She is a traditionalist at heart and has told friends they will become a 'proper family' after they tie the knot. She hasn't started planning the wedding yet as obviously she is set to drop any second now.

''But she can't wait to organise a big white wedding once she's settled into motherhood.''

Speculation about who will be getting invites has already begun, and it is uncertain whether or not Nadine will be asking her former band mates to join her on the big day.

The insider added: ''Who knows whether she will invite her former band mates though - it's doubtful Cheryl Cole would turn up given their history.''

It is the second time Nadine and Jason have got engaged, after the first ended in June 2011 because she wanted to focus on herself before committing to marriage.

She said at the time: ''I still feel I want a bit more me-time before I can fully commit to getting married.''

The singer's PR has refused to comment.