Victoria Beckham would reportedly love to give baby Harper a sister.

The singer-turned-designer already has four children with her soccer star husband David Brooklyn, Romeo, Cruz and Harper.

Now it seems the couple could be ready to add to their brood.

"Victoria is keen to give Harper a little sister," a source told British magazine Closer.

"She's always been so close to her own sister, Louise, and the boys are all best friends, so she'd love Harper to have that too."

Earlier in the year, David admitted he wanted two more children to complete his family with Victoria.

Now the super-slim star has relaxed her intense exercise regime, causing many to believe she may already be pregnant.

"She used to run six miles a day and do 200 stomach crunches a day, but she's not doing that at the moment," the source continued.

"It's definitely got tongues wagging!"

Victoria recently showcased her new collection at New York Fashion Week, where she showed off her usual slim figure in a black dress from her line.