Cheryl Cole's Girls Aloud twitpic

Cheryl Cole has posted a sneaky photo on Twitter of a Girls Aloud reunion, with mates Sarah Harding, Kimberley Walsh and Nicola Roberts.

Next year will be the tenth year anniversary of Girls Aloud's formation and the girls are hoping for a reunion tour.

Girls night in.. x," Cheryl said on her official Twitter account as she posted the picture.

Sarah Harding, who recently split from DJ Tom Crane, has just dyed her hair red and appears to be second from the back in the photo below.

And Sarah confirmed at London Fashion Week that she and the girls were planning to meet to discuss a comeback.

"We are having dinner together this week," Sarah told the Daily Mirror.

Cheryl Cole and Girls Aloud