The Wanted's Siva Kaneswaran is engaged.

The 25-year-old singer proposed to his girlfriend of six years, Nareesha McCaffrey, with a three-carat diamond solitaire ring at a birthday bash she'd organised for him.

He was especially careful not to blow the surprise and decided to keep his plans from Tom Parker, Jay McGuiness, Nathan Sykes and Max George.

He told UK issue of Hello! magazine: ''It was like a military operation to plan the proposal. I couldn't even tell the other boys in the band in case they blew the surprise.''

The lovestruck star has been planning to pop the question for a while but wanted to make sure his timing was perfect.

He gushed: ''I'd bought the ring months before I'd been trying to figure out the right time. I love her, I love every bit of her.''

Nareesha was taken by surprise and initially refused his proposal but later accepted.

Siva explained: ''When it came to proposing I had a little speech and said, 'The best gift you could give me would be for you to be my wife'. And she said 'No' and then she said 'Yes'.

''That's just her sense of humour. She's always making jokes like that - but I nearly fainted!''

Nareesha is excited to begin planning their big day.

She added: ''I'm still in shock. I don't like surprises and he really surprised me, but I was so happy. I can't wait to start planning the wedding.''