At 66 years of age, ROD STEWART is a father again.  His 39-year-old wife PENNY LANCASTER gave birth to a baby boy on Wednesday.  They named him Aiden.

This is their second child... they also have a 5-year-old son named Alistair.  And Rod has six other children from previous relationships.  Rod's oldest kid is a daughter who's 47 years old... which is eight years older than his current wife.