There's Something About Mary (1998)

The Farrellys nail the laughs in this comedy about Mary, the ideal girlfriend of every guy she meets, especially frustrated high school suitor Ted. A man gets a chance to meet up with his dream girl from high school, even though his date with her back then was a complete disaster. Ted (Ben Stiller) is still in love with his high school prom date, Mary (Cameron Diaz), even though it's been years after the humiliating incident that cut their date short. Ted hires Pat, a private detective (Matt Dillon) to track her down, but Pat ends up falling in love with her too! And so begins the hilarious battle for Mary's heart!