Greville was a favourite courtier of Queen Elizabeth and served under her and King James I as Treasurer of the Navy and as Chancellor of the Exchequer.
Greville obtained from James I a grant of Warwick Castle, and in 1621 he was raised to the Peerage of England as Baron Brooke, of Beauchamps Court in the County of Warwick, with remainder to his second cousin (once removed), and adopted son, Robert Greville.
Lord Brooke never married and on his death in 1628 the barony of Willoughby de Broke was passed on to his sister Margaret.
[2] His younger son, the fourth Baron, was one of the six commissioners deputed to invite the return of Charles II in 1660 and also served as Lord Lieutenant of Staffordshire.
In 1746 he was created Earl Brooke, of Warwick Castle, in the Peerage of Great Britain.