Martin Lewis is a British personal finance expert and journalist. He is the founder of the website MoneySavingExpert.com, which provides advice and tools to help people save money on their bills, mortgages, and other expenses. Lewis is also a frequent guest on television and radio programs in the UK, where he offers financial advice and guidance to viewers and listeners.

Before becoming a financial journalist, Lewis worked in the finance industry, including as a financial journalist for the BBC. In 2016, he was awarded an OBE (Order of the British Empire) for his services to consumer rights and charitable services.

In addition to his work as a personal finance expert, Lewis is also a campaigner on issues such as scamming and mental health. He has written several books on personal finance, including "The Money Diet" and "The Money Saving Expert".