Keith Richards has issued an apology to his Rolling Stones band mate Mick Jagger following some controversial comments he made in a recent interview. 

Speaking with WSJ Magazine, the legendary guitarist touched on Jagger becoming a father at 73 years old for the eighth time in late 2016. 

"Mick’s a randy old bastard," Richards said in the interview.

"It’s time for the snip—you can’t be a father at that age. Those poor kids!"

In a statement posted to Facebook, Richards apologised for the comments. 

"I deeply regret the comments I made about Mick [in the WSJ] which were completely out of line," the statement reads.

"I have of course apologised to him in person."

The rocky relationship between the iconic musicians has been highly publicised. In a recent interview on The Music's Producer Series podcast, mega producer Steve Lillywhite, who produced the band's 1986-released album, Dirty Work, spoke about the tension.

"In the total time that album took, I think they were both together no more than a couple of hours," Lillywhite said.

He continued, "Keith didn't know who I was and then after about a week, I was definitely on Keith's team because he was just more cool..." 

Listen to the full podcast below.