Mick Jagger, the vocalist of the English rock band The Rolling Stones, has become a father for the eight time at the age of 73. His 29-year-old girlfriend American ballerina Melanie Hamrick gave birth to a baby boy on Thursday. Jagger has five grandchildren and became a great-grandfather in May 2014. Notably, his eldest child is 46-year-old Karis Hunt Jagger.