"Grow Up" is a song performed by English singer-songwriter Olly Murs.

The song was released as a digital download in the United Kingdom on 7 October 2016 as the second single from his fifth studio album 24 Hrs (2016).

The song was written by Olly Murs, Steve Robson, Camille Purcell, Wayne Hector.

"Grow Up" debuted outside of the top-forty on the UK Singles Chart at number 52.

However Murs performed the song on The X Factor UK on 13 November 2016, resulting in the single climbing up the charts to number 25 (its peak) in its sixth week of release.