Editing When We All Fall Asleep, Where Do We Go?

On January 29, 2019, Eilish teased her debut album on social media for the first time, revealing its artwork and title, and further announced that she would be releasing a new single the following day at 9:00 AM PT.

As stated, a song titled "Bury a Friend" was released on the scheduled date alongside a music video and its parent album's track listing.

The song was praised by music critics, with some reviewers naming it her best song to date. It was also a commercial success, achieving double platinum certifications in Australia and Canada.

She had released several other singles in the previous year, of which two, "You Should See Me in a Crown" and "When the Party's Over", would appear on the album.

"Bury a Friend" was performed for the first time on February 11 at the Kesselhaus in Berlin for the first show of her 2019 European tour. It was later announced that she would perform a set of intimate acoustic shows at the Pryzm club in London on March 7.

On March 3, Eilish posted a snippet of an upcoming single named "Wish You Were Gay" in an Instagram post alongside an announcement revealing that it would be released as the album's fourth single the following day at 9:00AM PT. As stated, the song was released the next day.

Despite attracting controversy over allegations of queerbaiting, the song was also a commercial success and was certified platinum in the United States and Australia. A live video for the track recorded at a show in London that month was shared at the end of April.

On March 16, Eilish performed as a headliner at the South by Southwest festival, singing fourteen songs including the four singles from When We All Fall Asleep accompanied by "elaborate videos" on a rear-end screen. Her performance was well received by critics.

The album was released on March 29 alongside its fifth single "Bad Guy."

To celebrate the record's release, Eilish launched an immersive experience in partnership with Spotify consisting of several rooms, each symbolizing a song off the album, with objects to smell, hear and feel, reflecting the singer's synesthesia.

A music video for "Bad Guy" was shared later on during the day. The song would become Eilish's highest charting single thus far on a number of charts, reaching number 1 in countries including Canada, Norway, New Zealand and Australia and the second spot in the United Kingdom[86] and the United States.

A remix featuring Justin Bieber, who Eilish had been a fan of since her childhood, was released on July 11, having been teased by Bieber in a tweet.

To further promote the album, Eilish embarked on a world tour, which was announced in February 2019.

It would begin in April of that year with two performances at Coachella, the first of which was universally praised by critics, some of whom hailed it as the highlight of the day despite technical difficulties regarding Vince Staples's microphone during his verse on the track "&Burn".

Eilish then appeared at the Groovin' the Moo festival, which took place throughout the end of April and beginning of May. She was also part of the line-up of BBC Radio 1's Big Weekend on May 25 in Middlesbrough.

At the Glastonbury Festival on June 30, Eilish appeared on the "Other Stage" as a warm up for British rapper Dave, backed only by her brother on keyboards, a drummer and a plain, black stage.

Her slot received widespread critical acclaim, with reviewers citing her engagement with the audience and versatile performance as reasons for their praise.