List of Famous people who are 42

Yi-Ren Ng is a Malaysian American scientist who is an assistant professor in the Department of Electrical Engineering & Computer Sciences at the University of California, Berkeley. He was the founder, executive chairman and CEO of Lytro, a Mountain View, California-based startup company. Lytro was developing consumer light-field cameras based on Ng's graduate research at Stanford University. Lytro ceased operations in late March 2018.

Tomislav "Tomo" Miličević is an American musician and record producer. He was the lead guitarist of the rock band Thirty Seconds to Mars from 2003 to 2018. Born in Sarajevo but raised in the United States, Miličević moved to Troy, Michigan in the early 1980s, where he became active in the local heavy metal scene and played in a number of bands, co-founding Morphic. In 2003, he joined Thirty Seconds to Mars, with whom he achieved worldwide recognition in the mid-2000s after recording the band's second album A Beautiful Lie (2005). Its full-length follow-ups, This Is War (2009) and Love, Lust, Faith and Dreams (2013), received further critical and commercial success.

Märt Põder is an Estonian philosopher, freedom of information activist, presenter, publicist and translator.