The legendary musician's daughter is expecting her second child with her husband, financier Jack MACDonald.
Leah shares the exciting news with Hello! magazine, gushing over her father's relationship with her four-year-old daughter Maggie.
She says, "We don't see him often but when we do, he'll pick Maggie up and give her kisses and play with her. Dad is really good with Maggie."
Leah, who is Ronnie's daughter from his marriage to Jo Wood, has been married to MACDonald since 2008.