The former S Club 7 star – who married Alex Bourne last August – will welcome her first child into the world in November, her representative has confirmed.
Her spokesperson Liz Matthews told BANG Showbiz: "We are delighted to announce that Rachel Stevens and her husband Alex are expecting their first baby later this year. The happy news comes just a few months before the couple will celebrate their first wedding anniversary."
The 32-year-old singer added: "We are thrilled and so excited about becoming parents."
Earlier this week, Rachel admitted she thought it would be "amazing" to have children with Alex.
She said: "We'd absolutely love to have children. I think having children is the most amazing thing.
"I don't think I can tell what kind of mum I'd be until I go through it. It's such a life-changing thing. But I do have a little niece and nephew so I can just about change a nappy. Alex would be a great dad – he's very hands-on."