Legendary actor Robbie Coltrane's causes of death have been revealed after the star passed away aged 72 nine days ago. 

The Cracker and Harry Potter star's death certificate has shown he died from a number of conditions, including multiple organ failure.

It is also understood that the actor had been unwell for some time as he battled diabetes. 

According to reports from The Mirror, Coltrane died of sepsis, lower respiratory tract infection and a heart block. 

Heart block occurs when the electrical impulses which control the heartbeat are delayed or blocked. 

Coltrane's death was registered by his ex-wife, Rhona Gemmell, who the actor had remained close to after their spilt.

The Northern Echo: PAPA (Image: PA)

The death certificate also shows that it gives the actor's professional name and original birth name, Anthony Robert McMillan. 

The changed names come after he adopted the surname Coltrane in the 1970s as a tribute to the jazz saxophonist John Coltrane. 

The veteran Scottish actor starred in an array of hit shows and films throughout his career but was most known for his role as the loveable giant Hagrid in the Harry Potter movies. 

Coltrane was also well-known for his role as criminal psychologist Dr Eddie 'Fitz' Fitzgerald in the show Cracker. 

Following the sad news of Coltrane's passing, many left tributes to the star including comedian and author Stephen Fry who wrote: "I first met Robbie Coltrane almost exactly 40 years ago. I was awe/terror/love-struck all at the same time.

"Such depth, power & talent: funny enough to cause helpless hiccups & honking as we made our first TV show, “Alfresco”. Farewell, old fellow. You’ll be so dreadfully missed."

Whilst First Minster of Scotland Nicola Sturgeon shared: "Very sad news. He had such range and depth as an actor, from brilliant comedy to hard-edged drama.

"I think my favourite of all his roles was Fitz in Cracker. Robbie Coltrane, Scottish entertainment legend - you will be hugely missed. RIP."