We've found out recently that not Patrick Dempsey, but another famous actor was intended to play the unforgettably handsome "McDreamy". To find out who was supposed to play the famous surgeon from Grey's Anatomy, make sure to check out the video above! 

Rob Lowe could(!) have been great as "Dr. Derek Shepherd" 

The cast of 'Grey's Anatomy'


Who has NOT been with the show from season 1 to today?