Darren Cahill, who plays Vikings regular Prince Aethelred of Wessex, took to Instagram to release a teaser snap for upcoming episodes.
His character is the son of Judith and Aethelwulf, and half-brother to Judith’s son King Alfred (played by Ferdia Walsh-Peelo).
The picture, posted on his darrencahill8 Instagram account, shows the warring brothers staring menacingly into each other’s eyes while gripping onto daggers.
The caption read: “Will it be Aethelred vs Alfred?
“Or will brotherly love shine through?
“5b has all the answers, I can’t wait. #vikings.”
In new pictures, the brothers can be seen going head-to-head.
Covered in blood on a battlefield, who will survive?
The Instagram post left Vikings fans excited.
Loyal viewers took to the social networking site to respond and post their own speculations.
One fan wrote: “OMG what an epic picture!!! We cannot wait either! Hopefully a little brotherly love will remain…”
“Alfred will defeat the vikings due to history,” posted another.
A third added: “Aaah! I hope that brotherly love survives. I love you both together! @darrencahill8 and @ferdiawalshpeelo I can not wait either T.T.”
“Spoiler it’s gonna be Alfred, he’s the King of England who drives the Vikings from England and Unites the country under him…and he is know as Alfred the Great,” wrote another.
A fifth said: “If it goes to History like it should Athelred will get the crown and leave it to his brother.”
“Oh c**p!!! More fights between brothers!!! Cannot wait!” gasped another.
One fan looked forward tot he new episodes, saying: “I would love to see them fight!!”
“Hahaha! This isn’t going to end well… @darrencahill8,” teased another.
Another fan noticed that it may not be an official spoiler photo released by the programme makers due to a cast member munching on a sandwich in the background.
They said: “That dude eating a sandwich in the background though.”
Vikings season 4 airs on History at 9pm on Tuesdays and Vikings season 5 will return to Amazon Prime later this year.