Siba Mtongana (Photo: Gallo Images)
The star made the announcement on Instagram when she shared a picture of herself and her husband, Brian, attending the Miss South Africa pageant on Sunday where she was a judge.
“There’s 3 of us in this pic… another princess awaiting to be crowned,” she captioned the gorgeous snap.
Siba is already mother to three children – two boys, and one girl.
Excited to be expecting another girl, the star tagged her post with "#GirlSquadGrowing" and "#BalancingTheScalesAtHome".
Replying to a congratulatory message on Twitter, Siba wrote: "Thank you darling...We are thrilled. This is a huge blessing. A sister for my daughter!! Precious moments."
The celeb chef also referred to keeping her pregnancy under-wraps, as "the best kept secret the last few months," adding: "Consider having kids as though you're taxi driver. They hop on along the way but they don't change the direction u're headed.Meaning life must not stop becoz them. They just simply join the journey and enjoy the ride with you."