Say It Isn't So
- Taon: 2001
- Bansa: United States of America
- Genre: Comedy, Romance
- Studio: Say It Isn't So Productions, Conundrum Entertainment, 20th Century Fox
- Keyword: mistaken identity, crude humor, taboo, cross country, lovesick
- Direktor: J.B. Rogers
- Cast: Chris Klein, Heather Graham, Orlando Jones, Sally Field, Richard Jenkins, John Rothman