Trinity College; Westminster School.
On taking his degree he was elected a fellow of his college, and soon afterwards wrote the comedy, Loiola (London, 1648), which was twice performed before King James I. He was ordained in 1618, and through the influence of John Williams became rector in 1621 of Stoke Hammond, Buckinghamshire, and Kirkby Underwood, Lincolnshire. In 1623 he was chaplain to James, and in 1624 Williams gave him the livings of Street Andrew"s, Holborn, and Cheam, Surrey. He was Archdeacon of Bedford from 1631 to 1661.
When the so-called Root and Branch Bill was before Parliament in 1641, Hacket was selected to plead in the House of Commons for the continuance of cathedral establishments.
In 1645 his living of Street Andrew"s was sequestered, but he was allowed to retain the rectory of Cheam. His time at the Cathedral coming immediately after the English Civil War meant that Hacket had the unenviable task of overseeing the restoration of Lichfield Cathedral.
There is an effigy in remembrance of Bishop Hacket in Lichfield Cathedral.