2012–2013: Career beginnings, Lavender and Unknown Death 2002 Håstad,
Yung Sherman and
Yung Gud eventually formed the group "Sad Boys" as a trio. By 2012, Yung Gud and Yung Sherman were producing and mixing music while Håstad had begun writing lyrics and recording vocals in a makeshift studio in his basement. They shared the music they made on the platforms
SoundCloud and
Tumblr, where Lean began to generate a large following. Sad Boys performed their first show at
Röda Sten Konsthall in
Gothenburg, Sweden on 5 May 2013. Yung Lean became widely known when the music video for his track "
Ginseng Strip 2002" went viral. Later in 2013, he put out his first official releases:
Marble Phone, a single featuring
Kreayshawn,
Unknown Death 2002 and an EP titled
Lavender which includes the track "Ginseng Strip 2002" along with other songs that were cut from
Unknown Death 2002.
Consequence of Sound placed "Ginseng Strip 2002" at number 44 on their "Top 50 Songs of 2013", while
Vibe included
Unknown Death 2002 in their list, "The 10 Most Overlooked Debut Rap Mixtapes of 2013", describing it as "a natural progression from the freely associative, often nonsensical rhymes of
Lil' B with a keener sense of melody". In 2013, Yung Lean and Sad Boys toured throughout
Europe. Later that same year,
Acclaim Magazine had Yung Lean as their guest for a Q&A "smalltalk" segment, where they asked him about a wide variety of miscellaneous things, including his favourite hangover cure and his desktop wallpaper.
2014–2016: Unknown Memory and Warlord (July 2014) In 2014, Yung Lean and Sad Boys embarked on the White Marble Tour, playing in 24 cities across Europe. Shortly after the conclusion of this tour Sad Boys announced a further Black Marble Tour, which would include several performances in cities across North America. The first of these shows took place in July at the Webster Hall in New York City, and was well received by writers for publications such as
XXL, and
The New York Times. Yung Lean starred on
Studio PSL in May 2014 and was also one of five final nominees for the 2014
P3 Gold Awards in the Hip Hop/Soul category. Yung Lean released his debut full-length album, titled
Unknown Memory on 23 September 2014. The album was accompanied with North American and European tours, beginning on 1 December in New York with a nearly sold-out show on
Webster Hall's main ballroom stage. Yung Lean released his second full-length album,
Warlord, on 25 February 2016; he also released a line of clothing, "Sad Boys Entertainment". Håstad modelled for Calvin Klein's July 2016, AW16 Campaign. During his Warlord American tour, his tour bus in Pennsylvania was shot at. Håstad was also featured on
Frank Ocean's critically acclaimed
Blonde where he provided backup vocals on the songs "Godspeed" and "Self Control". According to Håstad, his part on the project was recorded when he was seventeen in Ocean's apartment in London. Yung Lean released a surprise track on 25 November 2016 titled "Hennessy & Sailor Moon (feat. Bladee)". On 14 December 2016 he released the mixtape
Frost God containing eight tracks including "Hennessy & Sailor Moon" and "Crystal City" which featured
A$AP Ferg.
2017–2019: Stranger, Poison Ivy and Nectar Håstad released his third studio album
Stranger on 10 November 2017, with the singles "Red Bottom Sky", "Hunting My Own Skin", and "Skimask", through Stockholm label
YEAR0001. In an interview with Complex in January 2018, Håstad announced he was writing several film scripts, including one based around Swedish serial killer
John Ausonius, best known as "The Laser Man". In February 2018, Yung Lean released the single "King Cobra" with
Thaiboy Digital, as well as a collaboration with Converse that consisted of a shoe and several items of clothing titled "One Star Toxic". On 2 November 2018, Håstad released his third mixtape
Poison Ivy with the single "Happy Feet" released on 24 October 2018. The album, a collaboration with
Whitearmor, a member of Drain Gang with whom Håstad frequently collaborates, debuted at number 44 on the Sweden Albums Charts, the Sverigetopplistan. On 25 January 2019, Yung Lean released his first full-length album under Jonatan Leandoer96,
Nectar, with the singles "Wooden Girl", "Nectar" and "Tangerine Warrior". The album strays away from Leandoer's sad hip-hop roots and goes for a blend of
indie rock and
neofolk.
2020–2024: Starz, Blodhundar & Lullabies, In My Head, Stardust, Sugar World and Psykos On 26 February 2020, Yung Lean released the single "Boylife in EU", produced by frequent collaborator Whitearmor. On 27 March 2020, Yung Lean uploaded a 44-second teaser featuring a mix of songs from his upcoming fourth-studio album
Starz. Owing to the global
COVID-19 pandemic, the Starz tour, which was due to begin in late March, was cancelled, and on 2 April 2020 Yung Lean streamed a 45-minute concert from the back of a truck in an undisclosed location, the stream featuring a mix of songs from previous works, as well as newly released "Boylife in EU". On 14 April 2020 the second single from Starz was released, "Violence + Pikachu". Starz was released on 15 May 2020, the album being produced by Whitearmor and Yung Sherman and featuring
Ariel Pink on the album's title track. On 9 November 2020, Yung Lean announced the release of his second full-length Jonatan Leandoer96 album, "Blodhundar & Lullabies". The 16-track album eventually released a month later on 21 December. On 27 November 2020, the documentary
Yung Lean: In My Head premiered in cinemas. Directed by music documentarian Henrik Burman, the documentary charts Leandoer's early career up until the release of
Stranger. This includes reflections on the events that occurred in Miami from Leandoer, fellow artist Bladee and additional persons including manager
Oskar Ekman, former associate
Steven Machat and journalists from a variety of outlets including
The Fader and
Pitchfork. The documentary was originally scheduled to premiere at the 2020
Tribeca Film Festival, but was delayed due to the COVID-19 pandemic. It released digitally and in a limited number of cinemas in the fall of the same year instead. On 8 April 2022, Yung Lean released a 12-track mixtape titled "Stardust" containing features from
FKA twigs,
Skrillex,
Drain Gang and
Ant Wan. On 14 December 2022, the single "Blue Light" was released as Jonatan Leandoer96, accompanied by a music video directed by Olle Knutson and Philip Hovensjö. This announced his full-length album titled
Sugar World, which was subsequently released on 3 February 2023. Yung Lean was featured on the track "Parasail" from
Travis Scott's
Utopia, released on 28 July 2023. He released
Psykos, a collaborative album with Bladee, on 13 March 2024. Yung Lean was featured alongside Swedish artist
Robyn on a remix of
Charli XCX's single "
360", released on 31 May 2024. On 4 November 2024, it was announced that Yung Lean would appear alongside Charli XCX in the upcoming film
Sacrifice, marking his feature-film debut. Later that month, he stated that he had cut ties with YEAR0001, and that future music and products would be released through his own label World Affairs.
2025–present: Jonatan Yung Lean announced his fifth studio album,
Jonatan, on 21 January 2025. The album was released on 2 May 2025. Håstad performed in front of an audience of 10,330 people on 1 March 2025 in the
Avicii Arena in Stockholm. The concert was well received by Swedish news outlets and described as a "collective triumph" by
Aftonbladet. Long-time friend Yung Sherman opened the show, and during the evening Håstad was guested by Yung Gud,
Ecco2k, Bladee and Thaiboy Digital. In June 2025, Håstad published a book titled
256 GB. The book contains hundreds of images taken on his personal phones between 2014 and 2024. ==Artistry==