Stand by · pulling the latest frames
Stand by · pulling the latest frames


Boy meets girl; boy falls in love (and had wild, non-stop sex) with girl; boy loses girl... when they discover they are brother and sister! But when he learns that he's the victim of the ultimate case of mistaken identity, the lovesick young man -- whom everyone still thinks is after some taboo thrills -- must race across the country to stop her from marrying another man.
4.8
Score
182 votes
“They share a love. They share a passion. And they might share DNA.”

Say It Isn't So (2001) Official Trailer # 1 - Chris Klein HD
Editorial context, craft details, and films that share its DNA.
