Get Up is the second extended play (EP) by the South Korean girl group NewJeans, released on July 21, 2023, by ADOR. Produced by Park Jin-su, 250, Frankie Scoca, Catharina Stoltenberg, and Henriette Motzfeldt, Get Up draws from R&B and dance styles such as UK garage, drum and bass, Baltimore, and Jersey club. Its sound is characterized by lively beats and synthesizers. Lyrically, the EP mainly revolves around feelings ensued from friendship and love.

Get Up was supported by three singles: "Super Shy", "ETA", and "Cool with You". All six tracks were accompanied by music videos that were collaborations with brands such as Apple and the Powerpuff Girls, and featured celebrities such as Hoyeon Jung and Tony Leung. NewJeans promoted the EP through a worldwide marketing campaign with Spotify and live performances on South Korean music programs and the Lollapalooza festival in the US.

Music critics generally praised the production of Get Up as experimental, refreshing, and engaging. It appeared on year-end lists of the best music of 2023 by publications such as British GQ, Paste, and Rolling Stone. In South Korea, the EP debuted at number two on the Circle Album Chart and sold 1.65 million copies within its first week of release. It peaked atop the US Billboard 200 and reached the top five in Canada, France, Japan, New Zealand, Scotland.

NewJeans surprise-released their debut single, "Attention", in July 2022. It was followed by their debut EP, New Jeans, which was supported by two other singles, "Hype Boy" and "Cookie". The EP became the first debut album by a K-pop girl group to sell over a million copies. The group later became the fastest K-pop act to reach one billion streams on Spotify, following the release of their commercially successful first single album, OMG, in January 2023. The album included the tracks "Ditto" and "OMG", the former of which became the longest-running number-one song on South Korea's Circle Digital Chart and marked the group's first entry on the Billboard Hot 100.

In January 2023, ADOR CEO Min Hee-jin revealed in an interview with South Korean magazine Cine21 that NewJeans was preparing an album. On April 4, 2023, South Korean news site Star News reported that the album would be released in July 2023, preceded by one of its B-side tracks set to be released at the end of June. Later that month, Min stated in an interview with Billboard that the group had finished recording in early April. In May 2023, Korean media outlets reported that the B-side track would be released on July 7. On June 19, 2023, ADOR officially announced the release date for NewJeans' second EP, titled Get Up, and revealed its tracklist which included the lead singles, alongside a snippet of one of the B-side tracks. On the same day, the EP was made available for pre-order. After the announcement, Hybe's share price rose by 3% in one day.

To produce Get Up, ADOR enlisted both long-time collaborators, such as South Korean producers 250 and Park Jin-su, and musicians outside of the K-pop music scene. The label organized a studio session in Copenhagen where they invited the Danish singer-songwriter Erika de Casier, Catharina Stoltenberg and Henriette Motzfeldt of Norwegian musical duo Smerz, Danish producer Fine Glindvad Jensen, American songwriter Kristine Bogan, and American producer Frankie Scoca, among others. De Casier, Stoltenberg, Motzfeldt, and Jensen already knew each other and were friends; both de Casier and Stoltenberg said they had never listened to K-pop before the project. Analyzing the musicians' discographies, critic Kim Do-heon noted that they all shared a R&B-based languid bedroom pop production mixed with UK garage. The musicians were initially divided in groups and asked to produce something by lunch; the only guide they had were loops sent by 250 to use as starting points.

De Casier, Stoltenberg, and Motzfeldt described the writing sessions as "spontaneous" and "playful" in interviews with GQ and Crack. It was their first time writing music for others, a process that they found liberating compared to working on their own music, which allowed them to naturally develop the songs. Used to working as a duo, Stoltenberg and Motzfeldt said that writing with others was initially confusing as they had to direct the production while Jensen and de Casier simultaneously wrote the tracks. Since they were writing for a group of teenagers, they decided to go for lively melodies and youthful lyrics. Stoltenberg said some of the elements and rhythms – "this half tempo, fast tempo switch and vocal samples" along with a "sparse" production – were inspired by footwork and similar genres they used to listen to at the start of their career. The session lasted a few days, during which the group wrote four of the EP's six tracks: "New Jeans", "Super Shy", "Cool with You", and "ASAP".

The first song they wrote was "Super Shy". De Casier said that she was inspired by her experiences as a shy teenager when writing the lyrics with Bogan. For "New Jeans", de Casier first came up with the hook "new year, new jeans, you and me" and her and Jensen built the song around the call and response chant, inspired by S.O.A.P. and Aqua. "Cool with You" was initially developed by de Casier and Jensen while they were sharing ideas and voice memos. "ASAP" was developed from a beat created by Smerz and based on one of 250's loops at the end of the session, during late afternoon, while the group was relaxing. The songs were then sent to the label and finished in South Korea, where some of the lyrics were changed and translated to Korean; NewJeans member Haerin was credited for the first time as a lyricist on "New Jeans" and member Danielle wrote lyrics for "Super Shy" and "ASAP". Park was also credited as a composer and producer on "New Jeans" and "Cool with You". The remaining tracks, "ETA" and "Get Up", were produced by 250; "ETA" was written by South Korean rapper Beenzino, Gigi, Ylva Dimberg, and 250, who also wrote "Get Up" with Freekind.