Nathan Jay Berkus is an American interior designer, author, and television personality. He runs the Chicago interior design firm Nate Berkus Associates and was a regularly featured guest on The Oprah Winfrey Show, offering design advice to viewers as well as coordinating surprise make-overs for people's homes. He has released numerous lines of products and authored several books.

Interior design is the art and science of enhancing the interior of a building to achieve a healthier and more aesthetically pleasing environment for the people using the space. With a keen eye for detail and a creative flair, an interior designer is someone who plans, researches, coordinates, and manages such enhancement projects. Interior design is a multifaceted profession that includes conceptual development, space planning, site inspections, programming, research, communicating with the stakeholders of a project, construction management, and execution of the design.