Troye Sivan Mellet (born 5 June 1995), better known as Troye Sivan (/trɔɪ sᵻˈvɑːn/), is a South African-born Australian singer, songwriter, actor, and YouTuber. As an actor, he played young James Howlett in the X-Men film X-Men Origins: Wolverine (2009), and most recently has starred as the title character in the Spud film trilogy. Sivan also used to regularly make YouTube videos and, as of 2 April 2016, has over 4 million subscribers and over 241 million total views.

On 15 August 2014, Sivan released his first major-label EP, entitled TRXYE, which peaked at number 5 on the U.S. Billboard 200. The lead single from the EP, "Happy Little Pill", reached number 10 on the Australian charts. On 4 September 2015, Sivan released his second major-label EP, Wild. His debut studio album, Blue Neighbourhood, was released 4 December.

His video, "The 'Boyfriend' Tag", with fellow vlogger Tyler Oakley earned them a Teen Choice Award in the "Choice Web Collaboration" category. In October 2014, Time named Sivan as one of the "25 Most Influential Teens of 2014".