Somewhat outdated and sexist term used to describe the primary exclusive assistant to the star on a movie. While most films have 2 top billed stars only the one at the 'top of the marquee gets. A girl friday. Girl Fridays are often actually guys. Since shooting a picture is so time consuming actors can be on set 16-20 hours per day to print maybe 3 minutes of finished product.so girl Fridays take care of all ancillary tasks for the star such as laundry. Any/all
correspondence and arranging on set visits with family. On set duties may include but are not limited to such
pedestrian tasks as bringing.coffee/lattes and food to the stars trailer limiting access to the star by basically being a buffer
not to be rude but to protect the star in question