People have spotted posters potentially teasing Harry Styles' new album

Last Saturday (5 October), Harry Styles sent Twitter into meltdown after writing just two letters: "Do".

Do

— Harry Styles. (@Harry_Styles) October 5, 2019

Yesterday (9 October), a number of posters and billboards have been spotted with the writing: "Do You Know Who You Are?"

The posters have a Columbia Records logo on it, and also the acronym "TPWK", which many fans believe stands for "Treat People With Kindness", a phrase that Styles has used many times.

New promotional banners from Columbia Records with the quote “Do You Know Who You Are?” seem to signify that Harry Styles’ second era is upon as fans have linked the “TPWK” acronym at the bottom to "Treat People With Kindness," a phrase Styles has repeated throughout his career. pic.twitter.com/YKAGN5Va8g

— The Pop Hub (@ThePopHub) October 9, 2019

It's already been two years since Styles released his self-titled debut album.

Back in August Styles revealed that his second album is about "having sex and feeling sad", and added that he did "a lot of mushrooms" while in Malibu's Shangri-La studios.