2006–2013: Lilla Melodifestivalen 2006, singing and acting
Ingrosso has acted in several musicals and plays such as Nils Karlsson Pyssling. He won the Lilla Melodifestivalen in 2006 with the song "Hej Sofia", and he represented Sweden in MGP Nordic 2006 in Stockholm, where he placed fourth.
In 2007, he released the single "Jag är en astronaut", which his uncle Linus Wahlgren had recorded and performed in 1985. Ingrosso's version peaked at number 2 on the Swedish singles chart. The same year he participated in Allsång på Skansen along with his mother, and he also took part in the Diggiloo tour. Between 2008 and 2009, Ingrosso acted in the musical Hujeda mej vá många sånger. At the Eldsjälsgala in 2009, Ingrosso and Pernilla Wahlgren performed a medley of The Jackson 5 songs, translated into Swedish. In late 2009, he performed as Rasmus in the play Rasmus på luffen along with Markoolio.
In 2011, Ingrosso performed as lillebror in the play Karlsson på taket flyger igen at Göta Lejon in Stockholm. In February 2014, he announced that he had left the musical scene to focus entirely on music and songwriting. In October 2016, he released his first music single called "Fall in Love", which he performed at Nyhetsmorgon which was broadcast on TV4. He signed a record deal with TEN Music Group.
