From Yale classmate Charlie Lipson.

HuffPo delivered news this morning which will curdle every Baby Boomer’s blood.

Sir Mick Jagger, the 70-year-old frontman for the Rolling Stones, has become a great-grandfather.

Jagger achieved the new status over the weekend when his granddaughter Assisi Jackson, 21, gave birth to a baby girl, the Daily Mail reported.

According to CBS News, the infant is the first child for Jackson and her boyfriend, 25-year-old chef Alex Key. The baby’s name has not been released.

The rock legend, who has been performing since 1962, has seven children with four women, and four grandchildren. Jade Jagger, Mick’s daughter by ex-wife Bianca Jagger, is the baby’s 42-year-old grandmother. The former model and socialite is expected to give birth to her third child in the next few weeks.