New posters for The Batman seem to contain secret messages that are visible under a blacklight, fans have claimed.

The new DC film, directed by Matt Reeves and starring Robert Pattinson as the caped crusader, has teased new images ahead of its forthcoming release next month.

• READ MORE: The Batman trailer: here’s everything we learned from the new teaser

On a new poster, one fan spotted a message written in the voice of the Riddler which is only visible when using a blacklight to read it. Batman and Catwoman (Zoë Kravitz) appear on the poster, with a Riddler symbol also in the picture.

Twitter user @Nervatel shared their discovery, zooming in on the orange sunset above Pattinson’s head. “So the new Batman poster… has a coded message one [sic] it,” they wrote.

I tried to get the whole thing as best as I could pic.twitter.com/3S8GiAF2gX

— Nervatel (@Nervatel) January 31, 2022

Coworker got a blacklight #Batman pic.twitter.com/AEDtjpkTZe

— Nervatel (@Nervatel) January 31, 2022

They then shared another image with the colours revealing the message, which reads: “You are a part of this too. Find out why.”

More fans decoded the message underneath the “find out why”, claiming they say: “You are the winged rat.”

Fans have also speculated that the new film will re-introduce the Joker to the franchise following the release of another trailer last December.

In a Japanese trailer shared on December 12, a sinister voice says at the end of the clip: “I’ve been trying to reach you, Bruce Wayne.” Although the voice could belong to Paul Dano’s Riddler, fans have also pointed at a brief glimpse at a wall showing a very distinct smile in the background of a photo as another possible hint of the Joker’s return.

The Batman will be released in UK cinemas on March 4.