Joseph Hahn, born on March 15, 1977, is an American musician, DJ, producer, director, and visual artist best known for his work in the band Linkin Park. Hahn, also widely known as Mr. Hahn, joined the band during its Xero days and has served an evolving role within the band over the years, not only performing and recording with them but also directing and producing most of their music videos.
Outside of Linkin Park, Mr. Hahn has directed two films: the short-film The Seed (2006) and 2015's MALL, the latter of which he also contributed to the score of. Hahn has directed music videos for other bands, as well. He has also made a number of appearances at events around the world on his own, as a DJ for parties and similar gatherings.