The "ghostly" figure is of an elderly woman, media reports said.
The phenomenon was caught on camera by two women - Victoria Greeves, 22, and Kayley Atkinson, 23 - as they were enjoying a girls' night out in Newcastle.
After finishing their drinks, they decided to take a selfie.
After striking their best self-portrait together, the two noticed there was a third person in the photo - appears to be an elderly lady in Victorian outfit.
The girls first uploaded the picture on Snapchat.
Terrified later, they deleted the photo from their phones but the photo is doing rounds on the social media.