Parents: Sean's parents' names are unknown. They are both Irish and they are still together.
Siblings: Sean has a big family with 5 children - three boys and two girls - and he is the youngest. He revealed the names of only two of his siblings, who are Allison and Malcolm, who is the writer.
Wives and kids: As of 2017, Sean has no children and he has never been married yet.
Sexual orientation: straight
Sean has a girlfriend from Denmark. Her nickname is Wiishu and her real name is Signe. She has never appeared on Sean's videos but Sean appeared on her own channel. In 2015, the two started living together in Ireland. Sean’s previous lovestories are unknown.
Sean's net worth is estimated at $9 million - that money comes mostly from his YouTube activity.
Place of living: Sean lives in the Irish town of Athlone in his own apartment. (Update: Now he lives in Brighton, England)
How did Sean start his video commentator career?
Sean started to turn his passion to video game comments into fullfledged YouTube channel after graduating a college.
What video games he reviews?
Sean reviews all sorts of games from AAA and VR games to flash and browser-based ones.
What are his most popular videos?
His most viewed videos are Five Nights At Freddy's 2 Animations
What is his video-making style?
He describes it as "energetic" by right.
What does his nickname mean?
"Jacksepticeye" is basically his childhood nickname combined with his memory about an eye injury he once had.
What is Septic-Eye-Sam?
It is the symbol of his YouTube channel - the green eye, which may be seen on the account picture. Sean also sells it as a toy.