Who is Meg's real father?

While Meg Griffin has been raised as Peter Griffin's daughter throughout Family Guy, a specific plot point in the series reveals that her biological father might be someone else entirely.

In the episode "Screwed the Pooch," it is discovered that Meg might actually be the offspring of a character named Stan Thompson. This revelation suggests that despite her upbringing and the Griffin surname, her true biological parentage could lie with Stan Thompson, rather than Peter.

For clarity, here's a breakdown of her father figures:

This information implies that although Peter is her legal and adoptive father, and the one who raised her, Stan Thompson is presented as her possible biological father within the show's narrative.