Please read the Editing Guidelines before making changes to the articles.
The boxes above don't contain much useful information and can't be changed, so editors should read the following paragraphs instead.
Actor pages: if you are familiar with a particular actor then, in the opening paragraph, you can make reference to a movie or TV series for which they are well known.
Character pages: if it says "not stated" under 'Real Name' in the infobox then your best guess at the name can be put in provided it ends with a question mark to indicate that it is not known from the episodes. The same can be done when only the first name is present.