well known       
adjective uk/ˌwel ˈnəʊn/ us/ˌwel ˈnoʊn/
A2 著名的,众所周知的
known or recognized by many people
  Her views on the subject are already well known. 她对于这个问题的观点人尽皆知。 
 [ + that ] It is well known that he never gives interviews. 众所周知,他从不接受采访。 
 The restaurant is well known for its friendly atmosphere and excellent service. 这家餐馆因其友好的氛围和优质的服务而声名远扬。 
 a well-known local artist 著名的当地艺术家 
 [ before noun ] a well-known face/voice 众人所熟识的面孔/嗓音 
 - More examples
 - One of the papers is running a competition in which you've got to parody a well-known author.
 - The bomb attack was in retaliation for the recent arrest of two well-known terrorists.
 - The Princess Royal is a well-known patron of several charities.
 - She is well-known for her profligate spending habits.
 - Several well-known women have been troubled by stalkers recently.