Sylvester Stallone's brother is furious that the 'Creed' star missed out on an Academy Award on Sunday (28.02.16).

Sylvester Stallone

Sylvester Stallone

The 69-year-old actor lost out to 'Bridge of Lies' actor Mark Rylance in the Best Supporting Actor category but Frank Stallone took to Twitter to blast the Academy and call the decision to award Mark the gong "bulls**t".

He fumed: "The Academy should be ashamed of themselves. It's as clear as the nose on your face that Sly won. Mark who? It's total Hollywood bullshit (sic)."

And he wasn't the only star surprised by the 'Bridge of Spies' actor's victory.

Mia Farrow tweeted: "Mark Rylance is wonderful!! I just assumed Sylvester Stallone would win."

Larry King posted: "The biggest shock of the night was Stallone not winning... #itsmy2cents (sic)"

'Extra' presenter Mario Lopez wrote: "Stallone winning was what I was most invested in tonight. Rocky has done so much for people#Robbery #PeoplesChamp (sic)"

Even Mark, 56, admitted he was shocked when his name was called at the ceremony in Los Angeles because he expected Sylvester to win.

Asked whether he had heard Stallone was tipped to take home the trophy, Mark told the BBC: "I'd heard the same thing. And Sylvester has had a long career as an actor. Doing thrillers and dramas and things like that. which have given people an enormous amount of pleasure. So I was seeing absolutely every reason why he should be celebrated for this incredible Rocky character that he made, back when I was a teenager."