Jagger already has seven children - Georgia, James, Jade, Elizabeth, Lucas, Karis and Gabriel - whose ages range age from 45 to 17.
Chris Jackson/Getty Images Mick Jagger arrives for the private view of "The Rolling Stones: Exhibitionism" at the Saatchi Gallery on April 4, 2016 in London, England.
Sir Mick Jagger is expecting his eighth child at the age of 72.
Hamrick previously performed with the American Ballet Theatre in NY and started dating the English singer in 2014, the report said.
He has five grandchildren and, since May 2014, a great-grandchild after his granddaughter Assisi gave birth to a baby girl.
The couple has not commented on the news just yet. "It will be Mick's eighth child and nothing fazes him". He is also a grandfather and great grandfather. He's been incredibly supportive, a source told The Sun. His 38-year-old wife Sally Humphreys is a theatre producer.