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.
Currently, you can only stream Say It Isn't So on Disney+ in the the United States.
You can buy or rent Say It Isn't So on the following streaming services in the the United States: Amazon, AMC Theatres, Vudu, iTunes, Microsoft and Google Play.
Say It Isn't So was released 23 years ago in 2001.
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