• BREAKING NEWS ABC shows live and on-demand -- Download the WATCH ABC app!

OTRC: Mick Jagger, 70, becomes a great-grandfather, also set to welcome 5th grandchild

Mick Jagger of the Rolling Stones arrives at Haneda International Airport in Japan on Feb. 23, 2014. (Motoo Naka / Startraksphoto.com)

Coolest. Great-grandfather. Ever.

Mick Jagger's 21-year-old granddaughter, Assisi, gave birth to a baby girl, UK magazine Hello!, which had revealed her pregnancy last year with an exclusive photo, reported on Sunday. This is her first child for her and her 25-year-old boyfriend Alex Key, a chef, the outlet said.

Jackson's mother is Jade Jagger, 42, one of the 70-year-old Rolling Stone frontman's seven children. Jade is the only child of Mick and Bianca Jagger, his first wife, and is pregnant herself, with her third child, who will become Mick's fifth grandchild.

The singer also has four children with second wife Jerry Hall, with whom he split in 1999, and two other children with two ex-girlfriends, models Marsha Hunt and Luciana Gimenez. Mick's most recent girlfriend, fashion designer L'Wren Scott, died ate age 49 in March.

The Rolling Stones postponed several tour dates after her death. The band is set to perform next on May 26 in Norway.

(Copyright ©2018 OnTheRedCarpet.com. All Rights Reserved.)