Sir Mick Jagger has paid tribute to his late girlfriend L'Wren Scott.

The Rolling Stones rocker took to his Twitter account on Saturday (28.04.18) to mark what would've been the model's 54th birthday with a simple happy birthday message and a picture of her in a striking red dress.

He accompanied the picture, which appeared to be a professional one she'd had taken throughout her modelling career, along with the caption: ''Happy birthday L'Wren. MJ (sic)''

The 74-year-old singer was left heartbroken four years ago when the he found out that L'Wren - who he met in 2001 - had been found dead after ending her own life in her apartment in Manhattan, New York.

Mick said at the time: ''I am still struggling to understand how my lover and best friend could end her life in this tragic way. We spent many wonderful years together and had made a great life for ourselves. She had great presence and her talent was much admired, not least by me. I have been touched by the tributes that people have paid to her, and also the personal messages of support that I have received.''

Shortly after L'Wren's death, Mick was said to be casually dating Melanie Hamrick, but things got serious pretty quickly as the pair welcomed a son into the world in December 2016.

A source said at the time: ''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.''