Sir Mick Jagger To Become A Great-Grandfather Sir Mick Jagger is to become a great-grandfather at the age of 70, his daughter has revealed. Jade Jagger, 42, confirmed her daughter Assisi Jackson is expected to give birth in the New Year, saying: "It is true. I am going to be a grandmother. Jade will become a grandmother early in the New Year Although there have been rumours Ms Jackson, 21, was pregnant, this is the first time the news has been confirmed by a member of her family. In the article to be published in The Sunday Times' Style magazine next weekend, Jagger said her father shrugs off suggestions he is getting too old for rock 'n' roll. She added: "I think making Mick a grandfather obviously had a big impact whereas, now, making him a great-grandfather is no longer particularly fascinating." In June, The Rolling Stones performed at Glastonbury Festival for the first time in their 50-year career. The band played a two-hour set featuring hits from their five decades together, including Brown Sugar, Miss You and Start Me Up. Jagger, the daughter of Sir Mick and Nicaraguan actress Bianca Jagger, began a relationship with Piers Jackson while she was at school. Together they have had two daughters, Assisi and Amba Isis.