PewDiePie, Swedish YouTuber
Felix Arvid Ulf Kjellberg ( SHEL-burg, Swedish: [ˈfěːlɪks ˈǎrːvɪd ɵlf ˈɕɛ̂lːbærj] (listen); born 24 October 1989), known online as PewDiePie ( PEW-dee-py), is a Swedish YouTuber known for his Let's Play videos and comedic formatted videos and shows. Kjellberg's popularity on YouTube and extensive media coverage have made him one of the most noted online personalities and content creators. He has been portrayed in the media as a figurehead for YouTube and as being almost synonymous with YouTube gaming. In 2016, Time magazine named him as one of the world's 100 most influential people.

Born and raised in Gothenburg, Sweden, Kjellberg registered his YouTube channel "PewDiePie" in 2010, primarily posting Let's Play videos of horror and action video games. His channel experienced substantial growth in popularity in the following years, being one of the fastest growing channels in 2012 and 2013, and becoming the most-subscribed on YouTube on 15 August 2013. Over time, his style of content diversified to include vlogs, comedy shorts, formatted shows, and music videos. From 2015 to 2018, his content also shifted away from Let's Play content and became increasingly subject to media controversies.

In 2019, following a public competition with Indian record label T-Series, Kjellberg was overtaken as the most-subscribed YouTube channel. His channel currently holds the title of the fourth-most subscribed, albeit remaining the most-subscribed owned by an individual. Kjellberg had the most-viewed channel on YouTube from 29 December 2014 to 14 February 2017, and the channel currently ranks as the 24th-most-viewed, and the sixth among those owned by an individual. As of March 2022, his channel has over 111 million subscribers and has received 28.2 billion total views. His popularity online boosts sales for the titles he plays, and has allowed him to stir support for charity fundraising drives.