The Welsh pop star - who dropped her previous stage name Marina and the Diamonds - returned with 'Love + Fear' in 2019, after a four year hiatus, and now she's teased her fans that she's hard at work on a follow-up whilst in self-isolation during the coronavirus pandemic.
The 34-year-old singer posted a picture of herself sat in her colourful living room on social media to announce that she's started her next record.
She simply captioned the Instagram post: "Creating record 5."
Marina previously admitted she ditched her "ego" when she made her comeback last year.
She said: "A lot of my motives were coming from a place of ego as opposed to creativity or love, but then I lost that feeling and it worried me because I thought all artists have big egos, or at least really good ones do.
"I thought, if I don't have that feeling any more, maybe it means I'm not a good artist and I should just stop."
'Love + Fear' featured her huge hit with Clean Bandit, 'Baby', and the single 'Handmade Heaven'.
The follow-up to 2015's 'Froot' was split into two eight-song collections, which represent what it is to feel united and empowered by love, with the second half touching on feelings of fear and insecurity.
The 'I Am Not a Robot' singer - whose full name is Marina Lambrini Diamandis - added how she has toned down her "stylised" image now she is older and more comfortable in herself.
She said: "A shift took place and it just felt like that identity had taken over, everything stopped feeling fun.
"I just didn't feel comfortable any more with this very stylised persona that I was building with my imagery."