Tom Thacker

Thomas William Arnold Thacker (born April 11, 1973), also known by the stage name Brown Tom, is a Canadian musician, songwriter, singer, actor, and record producer. He is the lead guitarist, lead singer and co-founder of the punk rock group Gob, as well as the former co-lead guitarist, keyboardist, and backing vocalist for Sum 41. Thacker formed Gob with Theo Goutzinakis in 1993. Following Dave Baksh's departure from Sum 41 on May 11, 2006, Thacker was recruited as their touring guitarist, and then became an official member in 2009. He remained with Sum 41 from then, even after Baksh rejoined the band in 2015, up until the group's disbandment in 2025.

Though primarily known as a vocalist, guitarist and keyboardist, Thacker's first instrument was the drums. Early in his career, he played drums in the Canadian pop punk band The McRackins, contributing to two studio releases. In addition to guitar, bass, keyboards and drums, Thacker also plays the accordion.

Thacker has been in the films Going the Distance and Sharp as Marbles. He also played himself in the Canadian animated series Being Ian (Season 1, Episode 24).