Ty Dolla $ign duetted with his brother Big TC from prison at Coachella.

The rapper's sibling is currently serving a life sentence for murder at California's Calipatria State Prison, but he made an appearance at the festival in California on April 18, on a screen behind his brother singing in a pre-recorded clip.

The moment came midway through the hip-hop star's set and featured the backing of a live choir.

The set was also decked out like a prison yard with barbed wire and fencing.

Ty also brought out the likes of Wiz Khalifa, YG, Tyga, and Leon Thomas.

TC was sent down in 2004, and in 2015, Ty released the album 'Free TC'.

He later admitted that his sibling being sent to prison felt like he'd died.

He told Vice the following year: "Have you ever had a family member die? It's basically that. He's basically dead. It's like hell, almost. A living hell. Luckily, you can reach out and you can go see him, but it's like, he's basically dead. It's like if a family member dies. I want him back, man. He's a f****** human man. Imagine if you had someone stripped from the family, man. That s*** is f***** up man."

Defending his character, Ty went on: "He's a human. A smarta** human. A talented human. A human who could be on some whole other s*** right now."

Professing that he is a changed man since being incarcerated and hitting out at the criminal justice system in the state, he continued: "A human who is mine but who is totally different than he was then. You grow everyday. You change everyday. The whole system is f***** up, too. I damn near say that if you're going to put someone in for life, you might as well kill them. That's a human, you know? The world is f***** up."