Mitchell Kristopher Rowland is an American songwriter and multi-instrumentalist, best known for his work as a touring guitarist and for co-writing songs on all three of Harry Styles's solo albums.

"Watermelon Sugar", a song he co-wrote with Styles, Tyler Johnson, and Thomas Hull, was nominated for and won Best Pop Solo Performance at the 63rd Annual Grammy Awards in 2021.

[6][7] Ryan Nasci was the audio engineer on tracks for the album that would become Harry Styles when a session guitarist dropped out last-minute.

"[11] In September 2017, Rowland, Styles, and producers Tyler Johnson and Thomas Hull (also known as Kid Harpoon), recorded "Watermelon Sugar" in Nashville on a day off from Live on Tour.

[12] Following Live on Tour, Rowland co-wrote five additional songs on Styles's second album, Fine Line, including the single "Golden",[13] which eventually peaked at number 57 on the Billboard Hot 100.

[19] Harry Styles: Love on Tour was initially supposed to start April 2020, but was postponed due to the COVID-19 pandemic.

[29] In addition to his writing credits on the album, Rowland also did session work playing guitar, bass, percussion, and drums.

[23] "Music for a Sushi Restaurant" debuted at number 8 on the Billboard Hot 100, marking Rowland's third top-ten hit as a songwriter.