|Name:||Seán William McLoughlin|
|Also Known As:||Jacksepticeye, Jack|
|Official Website(s):|| Youtube Channel|
|On Fanlore:||Related pages|
Seán William McLoughlin aka Jacksepticeye is a Irish YouTube creator whose channel focuses on comedic Let's Plays. He's known for a particularly agressive style of commentary that's heavy on swearing.
Connection to PewDiePie
Jack and PewDiePie were fairly good friends at one point, which Jack set to star in the unaired second season of Scare PewDiePie. 
When the controversy over PewDiePie's use of anti-Semetic imagery occured, Jack posted a video titled "Let's Talk!" that laid out some of his thoughts on the matter and also tweeted in support of him. Afterward, however, he made a tumblr post recanted his support and saying he regretted focusing on what PewDiePie did, rather than the unethical media practices he'd hoped to critique. He has not actually ever revoked his support of PewDiePie.
- 'If I ever buy a Lamborghini, someone can shoot me' - Irish YouTube millionaire Jacksepticeye
- "Sean McLoughlin" tag, 3905 fics tagged Mark Fischbach/Sean McLoughlin
- PewDiePie Threatens To Leak Cancelled Second Season Of His YouTube Red Show
- "Let's Talk!", mirrored copy
- [http://therealjacksepticeye.tumblr.com/post/157418913013/a-follow-up Jack's Apology Post "A follow up..."