Miley Cyrus' brother ‘genuinely worried’ about dad Billy Ray after Trump inauguration performance

Miley Cyrus' older sibling has spoken out about his fear of 'losing' their father Billy Ray after his performance at Donald Trump’s Liberty Ball.

The 'Achy Breaky Heart' hitmaker, 63, sparked concern on Monday (20 January) due to his bizarre antics at the gig, which fans have dubbed a 'train wreck'.

His performance was plagued by technical issues, with Billy Ray complaining that he 'couldn't hear' his guitar and attempting to sing a cappella.

The Kentucky-born singer was also seen aimlessly wandered around the stage at some points while talking to the audience.

"When you have technical difficulties you got to just keep going," Billy Ray told the the crowd. "Or, as President Trump would say, you got to fight!"

The country star later said that he wouldn't have missed out on 'the honour' of performing, even if the 'microphone, guitar and monitors' were all on the blink.

"I was there because President Donald J. Trump invited me," he told PEOPLE in a statement. "I had a ball at the Liberty Ball last night and I’ve learned through all these years when the producer says, ‘You’re on,’ you go entertain the folks even if the equipment goes to hell.

"I was there for the people and we had a blast. That’s called rock 'n' roll!"

However, Billy Ray's relatives don't seem to have the same perspective, as his son Trace Cyrus has taken to social media to share his concerns.

The musician, best known as Metro Station's guitarist and backing singer, publicly pleaded with his father to get 'help' and said he 'barely recognises' Billy Ray these days.

He was adopted by the singer along with his older sister Brandi, 37, when the star married their mother Tish in December 1993, before the couple then went on to welcome Miley, 32, Braison, 30, and Noah, 25.

In an emotional Instagram post, Trace shared a childhood snap showing him and his dad grinning on stage, alongside a lengthy caption.

The 35-year-old wrote: "Since my earliest memories all I can remember is being obsessed with you and thinking you were the coolest person ever. I wanted to be just like you.

"The day you adopted me was the happiest day of my life. Sadly the man that I wanted so desperately to be just like I barely recognise now.

"It seems this world has beaten you down and it’s become obvious to everyone but you. You may be upset with me for posting this but I really could care less at this point."

"Me and the girls have been genuinely worried about you for years but you’ve pushed all of us away," Trace wrote. "Noah desperately has wanted you to be a part of her life and you haven’t even been there for her.

"That’s your baby girl. She deserves better. Somehow just like me she still idolizes you though. We are all hanging on to memories of the man we once knew & hoping for the day he returns."

Trace went on to tell Billy Ray that he was 'not healthy' and warned that 'everyone' could see it.

"Just like I showed up for you at mamaws funeral when you didn’t expect me to I’m still here right now," Trace continued.

"As I write this with tears in my eyes I hope you realise this message only comes from a place of love and also fear that the world may lose you far too soon. I love you Dad.

"We haven’t talked in a while but I’m over a year and half clean from alcohol. Guess what? I feel amazing.. I don’t know what you’re struggling with exactly but I think I have a pretty good idea & I’d love to help you if you would open up and receive the help. You know how to reach me. Till that day comes I will continue to pray for you."

Billy Ray has not currently publicly addressed his son's post.