The 24-year-old reality hopeful and model can be seen using what appears to be a rolled up bank note to snort a line of white powder from the surface of a table.
The pictures obtained by The Sun Online are said to have been taken from a video which was recorded last year (2017) during a shoot where the model went topless.
According to the website, they obtained grabs of a Snapchat clip from the shoot from another glamour model.
The woman, who the publication states wishes to remain nameless for fear of a backlash, said: I followed Megans career because I looked up to her as a model.
I was shocked when I saw this video posted on a public Snapchat account and I took screen grabs to show my friends.
More: Love Island
I forgot about them until I saw Megan on Love Island. Now shes on TV being watched by millions of impressionable young people, I think its wrong what she did.
Megan has been in the villa since week two.
Metro.co.uk have reached out to reps for both Love Island and Megan for comment on the matter.