"Margaret" is a song by American singer-songwriterLana Del Rey featuringBleachers, from Del Rey's ninth studio albumDid You Know That There's a Tunnel Under Ocean Blvd (2023). Named after actressMargaret Qualley, the then-fiancée of Del Rey's frequent collaboratorJack Antonoff, the song reflects on their relationship. Alove ballad, the song received positive reviews from critics.

Margaret was the last song written for Del Rey's ninth studio albumDid You Know That There's a Tunnel Under Ocean Blvd, written in September 2022.^[1] The song is a tribute to her long-time collaboratorJack Antonoff and his then-fiancéeMargaret Qualley, for whom the song is named.^[2][3][4] The song is written and produced by Del Rey and Antonoff, and featuresBleachers.^[5][6] "Margaret" narrates how Antonoff and Qualley first met.^[7] Del Rey got the inspiration for the song after listening to Antonoff playing the piano and singing.^[8] The song is described as aballad and alove song, with the chorus repeating the phrase "When you know, you know".^[6][9] Del Rey addressed the lyric by saying Antonoff and Qualley's relationship was a "when you know you know" situation.^[8]

Del Rey performed the song for the first time in April 2023 with Antonoff at the High Water Festival.^[10] She later performed the song with Antonoff at theAll Things Go Music Festival during her headlining set in October 2023, with Qualley in the crowd.^[11]American singerJeff Tweedy joined Bleachers to cover the song in May 2024.^[12]

Qualley referred to the song as "one of the craziest things to ever happen [to her]", further stating that she adored Del Rey. She said she cried during her first listen of the song.^[13] TheLos Angeles Times referred to the song as "tender".^[14]NME called Margaret one of the most "beautiful and moving" songs of the record.^[15]Billboard ranked the song number 9 from the album's 16 tracks, noting that Antonoff's deep and "wobbly" voice provided a pleasant contrast to Del Rey's.^[16]The Independent praised the song, calling it the album's highlight.^[9]

The lyric "I mean, join the party/By the way, the party is December 18" led to speculation that Del Rey had leaked the pair's wedding date. Qualley denied it, stating that Del Rey was "kind enough" to not put the real wedding date in the song.^[17][18] The couple were married on August 19, 2023.^[19]