I Am Not Your Father

The Reveal that his parents are not his real parents after years of Oblivious Adoption. This is when after a long time, the adoptive parents finally tell him.

Don't confuse with I Have No Son or That Thing Is Not My Child, nor a subversion of Luke I Am Your Father.

"Brian, Mr. Cohen wasn't your real father.
 * Dragon Quest IV, at the beginning of the Hero's chapter.
 * Dragon Quest V: None of the Heavenly Brides have real parents, and are actually descendants of Zenithians.
 * Supernatural, episode 4x10, "Heaven and Hell." Anna Milton discovers that her parents are not her real parents, and she is in fact.
 * Monty Pythons Life of Brian:

I never thought he was, Mum."


 * In the Syfy mini-series Tin Man, DG's parents revealed to her that she's adopted
 * Bad Habits strip.
 * The protagonist has a moment like this at the end of Shades of Grey (though it's the result of illegitimacy, not adoption).
 * Super Mario RPG: Frogfucius dramatically reveals to Mallow: "You...are not a frog!" (Since Mallow is a walking cloud creature, the audience isn't surprised.)
 * Everyone else at Tadpole Pond is shocked. Complete with scare chords accompanying the reveal.
 * In Kung Fu Panda 2, Mr. Ping finally admits that he's not Po's actual father. Of course, everyone else already knew, but just didn't talk about it.
 * In Disney's Hercules, after Hercules ends up smashing up a lot of stuff in town because he can't control his strength, his mortal father decides to tell him that he's adopted and gives him the medallion with the symbol of Zeus on it, which leads him to the temple.
 * Spock Prime (Leonard Nemoy) says this when mistaken as Spock's (Zachary Quinto), and thus his father in the 2009 Star Trek film.