Jacksepticeye

Seán William McLoughlin (born on 7 February 1990), known through his online pseudonym Jacksepticeye, is an Irish producer, game commentator, and internet personality, known primarily for his comedic Let's Play series on video games, loud and abrupt nature, and occasional vlogs on YouTube.

McLoughlin started his YouTube career in 2012, but started gaining a massive follower base after winning a PewDiePie shout-out competition in 2013, with his online presence growing after three years. He represents his channel with his fictional partner, Sam, a green infected "septic eye" with a tail.

As of 8 May 2016, his channel has over 10 million subscribers, over 4.4 billion total views, and is currently the 50th most subscribed channel on YouTube.

McLoughlin co-hosted the South by Southwest event in March 2016.

https://en.wikipedia.org/wiki/Jacksepticeye