Julien Christian Lutz (born October 31, 1975), better known as Little X, X or Director X, is a Canadian music video director. He also has his own clothing line X Fit. He was born and raised near Toronto, Ontario, and is of Trinidadian and Swiss descent.
Julien Christian Lutz attended both Mayfield Secondary School and North Park Secondary School in Brampton, Ontario. A protégé of Hype Williams, X has been noted for his high-budget, visually distinctive music videos for popular music singles, including videos for The Wanted, R. Kelly, Usher, Kanye West, Jay-Z, Korn, David Guetta, Nelly Furtado, Sean Paul, Justin Bieber, Drake, Nicki Minaj, T.I., Little Mix and Iggy Azalea. He is currently represented by DNA - David Naylor and Associates, Hollywood, CA. In 2015, Director X founded his own production company, Creative Soul in Toronto, Canada.
His trademark is tweaking the letterbox format; instead of just using black bars on the top and bottom of the frame to frame the image, many videos by X actually feature the bars opening vertically to reveal the video and closing vertically at the end, like a letter box.