London: The Rolling Stones star Mick Jagger's 29-year-old girlfriend Melanie Hamrick is reportedly expecting their child. This would be the singer's eighth child. According to a source, both Jagger, 72, and his girlfriend of two years are excited about the baby news, reports aceshowbiz.com. “This is great news. It will be Mick's eighth child and nothing fazes him. He's been incredibly supportive,” the source told The Sun newspaper. As for the mother, the source added: "She's very bright, intelligent, sparky and has her own ideas about how she wants to lead her life. She knows what a great relationship Mick has with all of his children and can't wait for him to be a dad again. They are taking the news in their stride." Prior to dating Hamrick, Jagger was married to Bianca Jagger and was in long-term relationships with Jerry Hall and the late L'Wren Scott. The singer is already father to seven children -- the oldest child being a 45-year-old and the youngest is 17.