Sir Mick Jagger has been sent a message of congratulations from L'Wren Scott's brother following the birth of his eighth child.

The 73-year-old Rolling Stones rocker and ballerina Melanie Hamrick, 29, welcomed a son into the world on Thursday (08.12.16), and Randall Bambrough - whose fashion designer sister dated the singer for over 10 years until her suicide in March 2014 - is ''happy'' for the 'Satisfaction' hitmaker.

Randall told the New York Daily News newspaper: ''I am happy for Mick. I have observed Mick to be a loving father, and family is very important to him.''

And Randall thinks L'Wren would have been happy that Mick - who also has Karis, 46, Jade, 45, Elizabeth, 32, James, 21, Georgia, 24, Gabriel, 18, and Lucas, 17, from past relationships - has moved on and found happiness.

He added: ''She would want him to have continued overall happiness in his life going forward, especially regarding his family.

''He cares very deeply about all of his children. This child will be well taken care of just like all the rest of his children.''

The 'Brown Sugar' singer was with Melanie in New York when she delivered their son, and everyone is said to be ''doing well''.

Mick's spokesperson 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.''

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

It was previously claimed Mick - who began ''casually dating'' Melanie after L'Wren's death - was ''shocked beyond belief'' when he learned he was to be a father again.

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

''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.''