Announcing to social media that her youngest son, Jo Sweet and parter Katie Buttel, are expecting a baby boy!
The 44-year-old former swimmer posted an emotional Instagram, captioned: 'Can't wait to meet the little man.'
The caption also read, 'Got to feel my grandson kick for the first time tonight. It was so awesome. Katie is looking so beautiful, and everyone is so excited. Bring on 2018...'
Katie also shared a sonogram of the little bub, saying: 'So amazing to see the little man again 👶🏼 ✨'
Griggs has said that her Better Homes and Gardens co-stars have already nicknamed her 'Joh-Nanna', and that she and husband Todd Huggins are thrilled to become grandparents when the baby is due in February.
The popular TV host shares her two sons, Joe and Jesse, with former partner and House Husbands actor Gary Sweet.