Brian Alexander Wecht (born April 22, 1975), also known by his stage and character name Ninja Brian, is an American multi-instrumental musician (but mainly keyboardist), songwriter, comedian, record producer, Internet personality, writer, actor, social media manager, and retired theoretical physicist.
He is best known as one half of the comedy musical duo Ninja Sex Party, one third of the video game-based comedy music trio Starbomb, and a member of the team of the Let's Play webseries Game Grumps, all three alongside Dan Avidan.
Wecht originally worked as a theoretical physicist, and notably held research positions at Harvard University, the Massachusetts Institute of Technology, the Institute for Advanced Study, the University of Michigan, and the Queen Mary University of London.
Specialized in particle physics, his work included research on string theory, supersymmetry, and quantum field theory.
He retired in 2015, choosing to join Game Grumps while focusing on his musical career.
He is also the co-creator of The Story Collider, a science-based story telling podcast recorded in front of a live audience.An improv comedian and musician, Wecht met Avidan in 2009.
The same year, the two created Ninja Sex Party, in which Wecht plays the character of Ninja Brian, an uncommunicative, homicidal masked ninja, in both live shows and music videos.
He performed all instruments on early Ninja Sex Party albums, until Tupper Ware Remix Party started acting as their backing band in 2015.
Since May 2018, Wecht also portrays Ninja Brian on his own live comedy show titled Ninja Brian's All-Star Variety Luau Spectacular.