Samuel Pepys PRS, MP, JP, (; 23 February 1633 – 26 May 1703) was an English naval administrator and Member of Parliament who is now most famous for the diary he kept for a decade while still a relatively young man. Although Pepys had no maritime experience, he rose by patronage, hard work, and his talent for administration to be the Chief Secretary to the Admiralty under both King Charles II and King James II. His influence and reforms at the Admiralty were important in the early professionalisation of the Royal Navy.