Troye Sivan Mellet is an Australian singer-songwriter and actor. After gaining popularity as a singer on YouTube and in Australian talent competitions, Sivan signed with EMI Australia in 2013 and released his third EP, TRXYE (2014), which peaked at number five on the US Billboard 200. Its lead single, "Happy Little Pill", reached the top 10 on Australian music charts. In 2015, he released his fourth extended play, Wild, followed by his debut studio album, Blue Neighbourhood. The album's lead single, "Youth", became Sivan's first single to enter the top 40 of the Billboard Hot 100 chart, peaking at number 23.

"Happy Little Pill" is the debut single by Australian singer and songwriter Troye Sivan. The song is the first single from TRXYE, his first extended play (EP) released by a major label. It was released digitally on 25 July 2014. The song was written by Troye Sivan, Brandon Rogers, and Tat Tong.