Why are the guys of Big Time Rush using their real names to act?

so they can not forget thier name and people will call them سے طرف کی thier names and not thier character name

They use their real first names in the دکھائیں to دکھائیں and تشہیر that they have a موسیقی career besides their acting career. It is a great way to let viewers know about their music. :)