The present paper deals with the topic of noun modification across different registers. The paper first presents some general information on registers, noun phrases and their modification, and then focuses on how nouns are modified in specific registers in order to provide the reader with the necessary information to understand the research part of the paper. The aim of the paper is to determine whether there are differences in the structure of noun phrases across different registers, specifically academic writing, newspaper prose and conversation. Based on previous research done by Biber (2009) we test the following hypotheses: more complex noun phrases can be found in academic writing and newspaper prose than in conversational register, nouns are more often post-modified in academic writing and newspaper prose than they are in conversation, and adjectives are more often found as premodifiers in conversation than they are in academic writing and newspaper prose. The research is based on the analysis of corpora with the use of the Sketch Engine tool. After conducting it and analyzing the data, it was found that only the first hypothesis is true for our corpora, conversational registers feature less complex noun phrases than academic writing and newspaper prose, but nouns are more often post-modified in conversations than they are in the other two registers, and adjectives are found not to be more frequent in conversation than in the other two registers, which could be due to the fact that the conversation corpus features all spoken texts, and not exclusively conversation.