Mick Jagger has become a grandfather again - his designer daughter Jade has given birth to a baby boy. It's Jade's first child with husband Adrian Fillary, her third overall, and the Rolling Stones star's fifth grandkid. The birth comes just weeks after 42-year-old Jagger's 21-year-old daughter gave birth to her first child at the end of April (14), making the Start Me Up singer a first-time great-grandfather. Jade, who is one of Mick Jagger's seven kids, also has a 17-year-old, called Amba. She and Fillary wed in 2012.