In 2021, Diamandis released her fifth studio album, Ancient Dreams in a Modern Land, which debuted at number 17 in the UK, and was followed by a deluxe version in 2022.

"[12] At the age of 16, she moved to Greece to be with her father and "to connect with [her] heritage and learn to speak the language," and sang Greek folk songs with her grandmother.

[11] She travelled for several unsuccessful auditions, including opportunities with the musical for The Lion King and a boy band organized by Virgin Records.

Even with the quite limited production of her early bedroom demos, she had this powerful yet vulnerable vocal and writing style that didn't sound like anyone else at the time".

[13] Diamandis' debut single "Obsessions" was released on 14 February 2009 through Neon Gold Records,[23] while her first extended play The Crown Jewels EP followed on 1 June.

[31] "Mowgli's Road" was followed by "Hollywood" on 1 February 2010,[32] which reached number 12 on the UK Singles Chart,[33] and was eventually certified silver by the British Phonographic Industry (BPI).

[33] It is certified Silver by the BPI, gold in Austria and the United States, and platinum by the respective authorities in Australia, Denmark and New Zealand.

She portrays the personas "Housewife", "Beauty Queen", "Homewrecker", and "Idle Teen", which represent several female archetypes of stereotypical American culture.

[61] It became Diamandis' first chart-topping album in the United Kingdom,[62] although at the time it was additionally distinguished as the lowest-selling number-one record of the 21st century in the country.

[71] After spending one month in New York City, Diamandis announced in February 2013 that she had begun writing material for an upcoming third studio album.

[86] In December 2016, electronic group Clean Bandit confirmed that "Disconnect", a song they had performed with Diamandis at the 2015 Coachella Valley Music and Arts Festival, would be released on their new album.

[88] To mark a new stage in her career, Diamandis announced via Twitter in 2018 that she would be dropping her "and the Diamonds" moniker to release music as simply "Marina".

In July 2019, she was scheduled to play a number of music festivals across Europe and the UK, before taking the tour to North America with 19 dates across the US and Canada in September and October.

[114][115] On 2 April 2024, through an interview with Rolling Stone, Diamandis announced her upcoming poetry book, Eat the World, set to be released on 29 October 2024.

[117] On 3 June 2024, it was announced that Diamandis, along with Anitta and Altégo will support Kylie Minogue at her BST Hyde Park performance on 19 July 2024.

[126][127][128][129] As a child, she would take inspiration from the differing musical tastes of her parents – Dolly Parton, Enya and George Michael from her mother,[10] and Haris Alexiou from her father – while also admiring pop acts of the era including the Spice Girls, Britney Spears and S Club 7.

She began smoking two years later in an attempt to sound like the Distillers' frontwoman Brody Dalle, "but it never worked, and now I'm just stuck with a bad habit.

[133] Paul Lester wrote in 2008 that Diamandis' musical direction was "hard to fathom", given the frequency with which she alternated "simple keyboards-based ballads" and "quirky new wave-inflected numbers".

[144] Many of the artists listing Marina Diamandis as an influence include Bridgit Mendler,[145] Camila Cabello, Billie Eilish and Kim Petras.

[148] During the Electra Heart era, she called comparisons to Perry, Lady Gaga, and Lana Del Rey "really annoying", preferring to be classed as herself.

[141] Her vocals have been compared to those of Karen O, Regina Spektor, Kate Bush, Florence Welch, Britney Spears,[135][149] and Siouxsie Sioux,[150] with an androgynous timbre akin to those of Annie Lennox and Heather Small.

[11] When reviewing The Family Jewels, Joe Copplestone from PopMatters noted that Diamandis' vocal delivery occasionally overpowers the "inventive" melodies showcased in her songs.

[153] Rory Cashin of Slate lauded Diamandis' lyrics as "esoteric", likening her to an "emotionally intelligent outsider who knew how to perfectly articulate those weird thoughts and reactions we all have but would never admit to".

[142] Diamandis has identified Sophia Loren, Leigh Lezark, Shirley Manson and Gwen Stefani as her fashion icons,[156][157] with Asli Polat and Mary Benson being among her favourite designers.

[161] Four years later, she described her costumes then as "very badly put together vintage, kind of glittery ensemble", and her outfits for Froot as a "mix of '70s with digital fiberware ... something surreal and '70s".

[162] It was written in Billboard in June 2016 that she is among "pop artists with major fanbases in the U.S. and a consistent stream of excellent music who are nonetheless kept a tier below these other musicians in terms of national presence, because they never had that one hit that everyone simply has to know them from".

[86] Diamandis plays down her popularity in the gay community in order to avoid sounding like a "cliché pop star",[164] and hopes for a time when acceptance will mean that people do not label themselves by their sexuality.

[176][177][178][179] Her second album Electra Heart focused on exploring the feminine psyche and the ways women are embodied in American cultural stereotypes, with the track "Sex Yeah" often described as a "feminist statement".

[180] A few years later, Diamandis decided to work with an exclusively all-female team on her fifth studio album Ancient Dreams in a Modern Land in order to produce a longer feminist narrative.

[185] In her twenties, Diamandis suffered from bulimia, an experience which partly inspired her debut poetry collection, Eat the World, which was published in 2024.