Henry Hastings, 3rd Earl of Huntingdon, KG, KB was an English Puritan nobleman. Educated alongside the future Edward VI, he was briefly imprisoned by Mary I, and later considered by some as a potential successor to Elizabeth I. He hotly opposed the scheme to marry Mary, Queen of Scots, to the Duke of Norfolk, and was entrusted by Elizabeth to see that the Scottish queen did not escape at the time of the threatened uprising in 1569. He served as President of the Council of the North from 1572 until his death in 1595.

The succession to the childless Elizabeth I was an open question from her accession in 1558 to her death in 1603, when the crown passed to James VI of Scotland. While the accession of James went smoothly, the succession had been the subject of much debate for decades. It also, in some scholarly views, was a major political factor of the entire reign, if not so voiced. Separate aspects have acquired their own nomenclature: the "Norfolk conspiracy", Patrick Collinson's "Elizabethan exclusion crisis", and the "Secret Correspondence".