"Up All Night" is the debut solo single by English musician Matt Willis.

It was released as a single on 22 May 2006 and appears on his debut album, Don't Let It Go to Waste.

The song is about how Willis keeps thinking of a girl, and as a result cannot sleep at night.

It debuted at number 52 on the UK Singles Chart on download sales alone.

Willis's first televised performance of "Up All Night" took place on 7 May 2006 on Top of the Pops.