Is "needs no introduction" a common expression? What does it mean?

Native speaker’s answer
Rebecca
"Needs no introduction" is a pretty common phrase, particularly on talk shows or in interview programs. If you say that someone or something "needs no introduction", you mean that they are so well known that everyone knows who or what they are. Ex: My next guest needs no introduction, please welcome Beyonce. Ex: She needs no introduction. She's the most popular girl in school.