I can't find where i can add them :(

Your icon > custom lists (or your profile > lists) > make a new list > create a person or drama list and pick a style of list (public, private or voting) > save > in the search bar the bottom type actor/actress or drama's name in > save list when you've finished. 

You can also click on any existing lists in there and click the edit button (a pencil) and add to them.

than you! this helped a lot! I've been clueless about how to do this.

 zalcu:

Your icon > custom lists (or your profile > lists) > make a new list > create a person or drama list and pick a style of list (public, private or voting) > save > in the search bar the bottom type actor/actress or drama's name in > save list when you've finished. 

You can also click on any existing lists in there and click the edit button (a pencil) and add to them.

Thank you so much! Why just it is here so hard to find out, lol....