Sir Mick Jagger has welcomed his eighth child into the world after 29-year-old ballerina Melanie Hamrick gave birth to a healthy baby boy.

Sir Mick Jagger has become a father again - at the age of 73.

The Rolling Stones rocker - who already has Georgia, James, Jade, Elizabeth, Lucas, Karis and Gabriel from previous relationships - has welcomed his eighth child into the world.

It is his first with 29-year-old ballerina Melanie Hamrick, who gave birth to a healthy baby boy on Thursday at a hospital in New York with the 'Satisfaction' hitmaker present for the arrival of their little bundle of joy.

A spokesperson for Sir Mick said: "Melanie Hamrick and Mick Jagger's son was born today in New York and they are both delighted. Mick was at the hospital for the arrival.

"Mother and baby are doing well and we request that the media respect their privacy at this time."

Reposting one of my favorite photos taken by @nisian ❤️🙌🏻 #ballerina #fitness #art

A photo posted by Melanie Hamrick (@melhamrick) on

Details about the name and weight of the newborn are yet to be revealed.

Meanwhile, Sir Mick has reportedly promised to give Melanie £2.5 million to look after their child.

Sir Mick has been "casually dating" Melanie for around two years following the death of his fashion designer wife L'Wren Scott, who committed suicide in 2014.

He has also reportedly pledged to cover the cost of a home for both Melanie and the child wherever she decides to raise their baby.

One of my favorites from @flexistretcher 📸💥❤️ #ballerina #nyc #flexibility #ballerinastretch @renatapavam

A photo posted by Melanie Hamrick (@melhamrick) on

In July, meanwhile, it was reported that Sir Mick was shocked by the news he was set to become a dad again.

However, an insider also insisted he would have no hesitation in offering financial support to Melanie.

The source explained: "He was shocked beyond belief at news she was expecting but will do whatever it takes to support Melanie and the child."

The insider added: "They aren't living together and don't plan to. But Mick will look after the baby 10 times over. There is talk of buying a house for Melanie."