Mick Jagger's Kid, Grandkid Both Pregnant Rocker will gain a grandchild, great-grandchild around the same time By Evann Gastaldo, Newser Staff Posted Feb 11, 2014 12:31 PM CST 11 comments Comments This photo dated June 30, 2012 shows Jade Jagger, 2nd left, at her wedding to Adrian Fillary, 2nd right, with her parents Bianca Jagger and Mick Jagger at Aynhoe Park, Banbury, England, June 30, 2012. (AP Photo/Robert Astley-Sparke/LD Communications) (Newser) – Mick Jagger will soon become a great-grandfather for the first time ... but he's also becoming a regular ol' grandfather again, around the same time. Not only is his granddaughter, 21-year-old Assisi Jagger, expecting a baby; Assisi's mom, 42-year-old Jade Jagger, just revealed she's also pregnant, and six months along, the Daily Mail reports. "Happy to announce this granny is going to become a mummy," she wrote on Instagram today alongside a baby-bump photo. "Double whammy this year." Mick already has four grandchildren.