Jagger a great-grandfather, but still rolling

Mick Jagger has become a great-grandfather for the first time.

The 70-year-old Rolling Stones rocker's granddaughter Assisi Jackson and her boyfriend Alex Key welcomed a daughter into the world over the weekend, HELLO! reports.

The new arrival - whose name has not yet been announced - is the first grandchild for Assisi's mother Jade, 42, who is due to give birth to a baby boy next month.

Assisi, 21, previously admitted her grandfather was delighted she was expecting a baby.

She said: "He said, 'Well done,' and I said, 'I didn't have to try too hard.' "

However, she admitted the 'Paint it Black' star - who was left devastated in March by the suicide of his long-term girlfriend L'Wren Scott - was unlikely to be calling himself great-grandad.

She said: "I imagine it's nice to be a great-grandad - although I'm not sure he likes the idea of getting old, or being called one.

"I call him Mick - I wouldn't start calling him Grandpa."

Despite her young age, Assisi insisted the time was right for her to have a baby.

She said: "I grew up quite quickly and wouldn't have considered having a child if I was doing what my friends are doing at this stage, messing around.

"I don't drink, I don't smoke and I'm very settled."

The Rolling Stones are still rolling, with multiple dates in Europe, Australia and New Zealand this year.