Muhammad Ali died from septic shock.
The boxing legend - who died on Friday (03.06.16) at the age of 74 - was initially brought into hospital for breathing problems but sadly passed away after bidding farewell to his wife and children at his bedside.
During a news conference organised by his family's spokesperson, it was also revealed that Ali's funeral will be held on Friday (10.06.16).
The sportsman - who suffered a long battle with Parkinson's disease - will be remembered at a public service at the KFC Yum! Centre in Louisville, Kentucky on Friday (10.06.16) starting at 2pm.
A family spokesperson has confirmed that the service - which starts at two in the afternoon - will feature eulogies from former president Bill Clinton, Billy Crystal and Bryant Gumbel.
Meanwhile, to remember the late star, fans have been sharing a poignant excerpt from his 2004 memoir 'The Soul of a Butterfly', where he talks about how he'd like to be remembered.
In the passage, he shared: "I would like to be remembered as a man who won the heavyweight title three times, who was humorous and who treated everyone right.
"As a man who never looked down on those who looked up to him, and who helped as many people as he could. As a man who stood up for his beliefs no matter what. As a man who tried to unite all humankind through faith and love.
"And if all that's too much, then I guess I'd settle for being remembered only as a great boxer who became a leader and a champion of his people. And I wouldn't even mind if folks forgot how pretty I was."
His heart "continued beating for 30 minutes" after all his other organs failed.
His daughter Hana feels relieved that the late sportsman, who died on Friday (03.06.16) from complications following his long battle with Parkinson's disease, is finally "free".
In a message posted on her Instagram account, she wrote: "Our hearts are literally hurting. But we are so happy daddy is free now. We all tried to stay strong and whispered in his ear, 'You can go now. We will be OK. We love you. Thank you. You can go back to God now.'
"All of us were around him hugging and kissing him and holding his hands, chanting the Islamic prayer. All of his organs failed but his HEART wouldn't stop beating.
"For 30 minutes ... his heart just kept beating. No-one had ever seen anything like it. A true testament to the strength of his Spirit and Will! Thank you all for your love and support. (sic)"
Meanwhile, Rasheda also took to social media to praise her late father.
She wrote: "The Greatest Man that ever lived. Daddy my best friend & my Hero You R no longer suffering & now in a better place. (sic)"
Whilst Asaad shared an old photo of his father on Instagram, captioning it with a sweet message about everything he has learned from the boxing champion.
He wrote: "Forever grateful for everything you have ever gave me.. You've shown me how to love the world in ways I didn't know possible. You've shown me how to be brave and courageous in situations beyond my belief!
"You've taught me so much the last 25 years things that will forever be imprinted in my soul. I'm able to sit here and write this post without falling apart because I honestly know you are in a greater place.
"And I'm happy you get to go home to grandma now I know she has missed you like crazy!.No one will ever touch this earth the way you did. God has came down and took back one of his kings! . Rest easy Dad and continue to look over me sincerely. Your youngest (sic)"
Muhammad also leaves behind his six other children - Laila, Maryum, Jamillah, Khaliah, Muhammad Jr. and Miya.