The studio head allegedly wanted to cut the entire plot thread with Estevez's character being hopelessly obsessed with Andie MacDowell's character because they felt that it was 'too embarrassing'. Only when test audiences reacted so passionately to the ski lodge kiss scene did he admit that the director was right to include it.
Demi Moore was chosen for the part of 'Jules' after Schumacher watched her flee from a John Hughes casting session. He instructed his assistant to run after her and find out whether she was an actress.
The unexplained camaraderie that centers around the oft shouted phrase, "a boogata boogata boogata huah huah huah" (spelling subject to interpretation!), actually comes from an on-set joke among cast members. Some of the cast members laughingly noted that when a group of people, huddled in private conversation, erupted into laughter, it always sounded oddly like...a boogata boogata boogata (mumbled) huah huah huah (guffawed)
The director originally had felt that Rob Lowe wasn't right for the part of wild child 'Billie'. Only after repeated phone calls from his agent and a passsionate speech about why he wanted the part did Rob eventually get it...