Astro of UB40 has died aged 64.
The musician - whose real name was Astro Wilson - passed away after a "very short illness".
The official UB40 Twitter account said: "RIP ASTRO.
"We have heard tonight, the sad news that ex-member of UB40, Terence Wilson, better know as Astro, has passed away after a short illness.
"Our sincere condolences to his family.
Ali Campbell - who starred alongside Astro in UB40, before reuniting with him alongside Mickey Virtue - also confirmed the news on the micro-blogging platform, admitting to being "completely heartbroken" about Astro's passing.
He tweeted: "We are absolutely devastated and completely heartbroken to have to tell you that our beloved Astro has today passed away after a very short illness. The world will never be the same without him.
"We ask you to please respect his family's privacy at this incredibly difficult time."
Astro was part of UB40 from 1979 until he left the group in November 2013.
And the musician previously admitted that he relished reuniting with Ali and Mickey after leaving the group.
Asked about working with them in the studio, he said: "It was absolutely perfect.
"It was just like time had stood still, it was just like nothing had changed. The same band terms, the same jokes that we were telling years ago. Nothing's changed.
"I feel like at the mark of true friendship, no matter how long you spend apart from each other, the second you meet up with each other, it's just like all that's happened, it's washed away and it's just like, you know, we've never been separated. So we're just having a vibe at the time, there's no politics, there's no one to contend with. It's just a really, really relaxed atmosphere.
"We got a great bunch of musicians around us. I couldn't be happier."