Sandy and Grease - Because actor Peter Gallager (who plays Sandy Cohen) played Danny in a broadway producion of Grease.
Marissa and The Sixth Sense - Because actress Mischa Barton (who plays Marissa Cooper) plays Kyra Collins in The Sixth Sense.
Seth and The Ring - Because actor Adam Brody (who plays Seth Cohen) appears in The Ring.
Marissa being skinny
Oliver coming back
Ryan looking like Russell Crowe