Una Healy is to wed boyfriend Ben Foden.

The 30-year-old beauty - who is currently pregnant with her first child with the rugby ace - showed off her diamond engagement ring while on the first night of her tour with The Saturdays at Wembley Arena last night (16.12.11).

Writing on twitter, the Irish-born star said: "Thank you so much for all the lovely for messages for Ben_Foden and I on the announcement of our engagement. Big love to you all. Xxx(sic)"

Ben said recently he was going to propose to Una - who is expecting a baby girl - but had to pick the right engagement ring.

He said: "I am planning to go down on one knee during the next few weeks. It won't come as a total surprise because we've been discussing marriage for some time.

"It will happen and I want lots of children. I plan to do it right with a simple, classic item from Cartier so she won't refuse me."

Last month Una said there was "no way" she would propose to him and she was waiting for him to get down on one knee.

She said: "At the end of the day, it's up to the guys. There's no way I'd consider proposing. I'd get no satisfaction from asking him."