Monaco's Princess Caroline becomes a grandmother

(AP) Princess Caroline of Monaco is now a grandmother.

Her eldest son's fiance, Colombian heiress Tatiana Santo Domingo Andrea Casiraghi, gave birth to a baby boy Thursday. The baby's father, Andrea Casiraghi, is the nephew of Monaco's ruling sovereign, Prince Albert II. Albert is the son of late American film star Grace Kelly and Prince Rainier III.

The Monaco palace said Princess Caroline is overjoyed by the newest addition to the jet set royal family.