Melanie Hamrick was "physically attacked" on a night out

She wrote on Instagram: "This is incredibly hard to share, but I was physically attacked at Annabels Mayfair tonight.

"I'm so thankful to my friends for protecting me. Two people grabbed me from behind and thank god for good people who stepped in to help me.

"I'm shaken, sad and heartbroken that people can treat each other this way."

No further information about the incident is currently available.

Melanie previously defended the 44-year age gap between herself and Mick and joked the Rolling Stones rocker may be in his 80s but behaves "younger" than her.

She told Page Six: "He's younger than me.

"He's amazing, he really is."

The couple first met in 2014 when they were both on tour in Japan and Melanie explained that they didn't have an instant romantic connection.

Asked if they had an immediate spark, she said: "Maybe a spark, but nothing incredible, like, 'Come on, I'll blow your mind and we'll travel the world'.

"We didn't even exchange phone numbers. At the time, I wasn't in a relationship, but he was."

The couple's relationship soon became romantic and Melanie credits the pair's "support" for each other for keeping their union going.

She explained: "We try to support each other, be there for each other, and make sure everyone is happy. That's all that matters to me and all I strive for."

Melanie previously claimed that she ignores those who comment on the age gap between her and Mick.

She told The Sunday Times newspaper last year: "Everyone's going to have their opinion.

"If you think about others' opinions, no matter where you are in life, you're going to have a problem and you're going to analyse it. I put the blinders on. Am I happy? Yes. Are the people in my life happy? Yes. Am I hurting anyone? No. OK, they can mind their own business."