Sir Mick Jagger is said to have mixed feelings about becoming a father again because he is worried about his age. Sir Mick Jagger is reportedly worried about being an elderly father. The 73-year-old Rolling Stones rocker is set to become a dad for the eighth time when ballerina Melanie Hamrick, 29, gives birth, and he is said to have mixed feelings about the impending new arrival. A source said: "He hasn't responded to people sending him congratulations. "Family is extremely important to him, and he is unhappy at the thought that when he should be teaching his kid to play catch, he'll be 80 years old." Though Mick and Melanie - who were first romantically linked in 2014 - had been spending a lot of time together earlier this year, the ballerina hasn't been seen backstage at his gigs since their show in Bogotá, Colombia, in March and the 'Brown Sugar' singer never introduced her to anyone as his girlfriend in the way he did with late former partner L'Wren Scott. A source told the New York Post newspaper's Page Six column: "Mick [had] introduced L'Wren as his girlfriend; he never presented Melanie to us that way. "But there were girls lining up each night to meet him, and he never appeared to be with any of them." Though the couple's on/off relationship has been very fragmented, Melanie is said to find it exciting. She reportedly told a friend: "When we get together, it's always like a honeymoon." It was recently claimed Mick has agreed to pay Melanie $15 million and buy her a house, and insiders now say she is planning to move to either Connecticut, where she has family, or Los Angeles, where the 'Sympathy for the Devil' hitmaker spends a lot of time.