For someone who was confused with this sentence like me: Louis Vuitton is a big company! Although we always consider LV as a super luxury brand producing various handbags that popular in conceited, sardonic, insolent nouveaux riches, Louis Vuitton is a company literally. And I've got this from AI assistant: the phrase "She got her foot in the door at Louis Vuitton" means that she has secured a position or an opportunity, potentially at a lower level, within the prestigious company Louis Vuitton. It suggests that she has made an initial step or entry into the organization, which could lead to further opportunities or advancements in her career there. This expression often implies that getting in at a well-known or competitive place can open more doors for future growth.