While it may be old news now, Sean Penn and Madonna were once married from ... saying "she was worried because there were guns in the house." Then, things quickly took a turn.

The Hollywood JR / BACKGRID Sean Penn and his girlfriend Olga Korotyayeva enjoyed a night out with Rande Gerber. The Oscar winner, 63, and Korotyayeva, 43, spent some time at Soho House in Malibu ...

From his appearance on "Little House on the Prairie" to his complicated love life, here are 17 things you probably don't know about Sean Penn.