Jack Manifold (born August 14, 2002), better known online as JackManifoldTV (formerly Thunder1408), is an English YouTuber and Twitch streamer. He is best known for being a part of the Dream SMP and TommyInnit's vlogs.
Jack has been/is part of four major SMPs: SMPLive, SMPEarth, Dream SMP, and Origins SMP.
Currently, he streams on Twitch and posts the vlogs on YouTube. He also occasionally makes vlogs and other videos, usually with Niki Nihachu, Tommy and Tubbo.