Revealing mistake: Right after Allison gives birth and they are handing her the baby, you can see the baby's belly button, and the umbilical cord is below that.
Knocked Up (2007)
1 revealing mistake
Directed by: Judd Apatow
Starring: Paul Rudd, Seth Rogen, Katherine Heigl, Leslie Mann
Audio problem: When Ben and Jason are talking over the phone, after Jason tells Jonah, "Your mom is already there", we hear Jonah say, "Uncool man," but his lips are mouthing something different. (01:47:05)
Alison Scott: I'm pregnant.
Ben Stone: Fuck off.
Alison Scott: What?
Ben Stone: What?
Trivia: The actress who plays Debbie is Leslie Mann, and she is the real-life wife of writer/director Judd Apatow. And the two girls who play Debbie's daughters are their daughters in real life. This was done on Apatow's part to make the on-screen family seem more like a real family.