Mark Andrew Wilson (born August 1980) is an Australian musician, originally from Geelong.

He also can be seen playing an Epiphone Jack Casady signature bass in the Are You Gonna Be My Girl video.

Wilson also plays piano on some tracks ("Look What You've Done", "Seventeen", "She Holds a Grudge"), and occasional percussion, samples, synthesizer, and harmonica.

He sometimes provides backing vocals ("Rollover DJ", "Beat on Repeat", "Times Like This") He co-wrote "Start the Show" with guitarist, Muncey.

Months later, it was announced that Jet would be reuniting in 2017 to open for Bruce Springsteen on his Australian tour.