As a second cousin of the new Queen, Anne Nevill, he attended the coronation of King Richard III in 1483 when, despite his young age, he was knighted. Having succeeded to his father's peerage and estates in 1492, he achieved prominence fighting against the Cornish rebels in 1497 at the Battle of Blackheath. In 1497 he took his place in the House of Lords and became involved in national affairs, being appointed to the privy council and in regular attendance at court. However, in 1506 he fell into serious trouble for keeping an illegal private army, being fined the immense amount of 100,000 pounds and subjected to a travel ban. When Henry VIII became king in 1509, the fine was cancelled and a pardon granted. By 1512, he was back on the council and in 1513 was elected to the Order of the Garter. In that year he served in the expedition to capture Tournai and then to relieve Guînes. At the coronation of Henry VIII, he held the office of Chief Larderer and in 1512 he was granted the castle and lands of Abergavenny. He was a keen jouster and accompanied both King Henry VII and King Henry VIII on state occasions, including the meetings in 1520 with King Francis I of France at the Field of Cloth of Gold and with Charles V, Holy Roman Emperor, at Gravelines. The trial and execution in 1521 of his father-in-law Edward Stafford, 3rd Duke of Buckingham, led to his own imprisonment for a year in the Tower of London. After admitting he had concealed the duke's treason, he was stripped of all his offices, fined 10,000 marks and had to sell his house to the king. He was then pardoned, being allowed to continue serving at court, in Parliament and in war, but regarded with suspicion. In 1530 he signed the petition asking Pope Clement VII to dissolve Henry VIII's marriage to Catherine of Aragon and was allowed to buy back his house. At the coronation of Anne Boleyn in 1533, he once again was Chief Larderer and was allowed to officiate. On 4 June 1535 he made his will at Eridge in Sussex and died on 13 or 14 June. He was buried at Birling, Kent, with his heart interred at Mereworth.
He married secondly, before 5 September 1513, Margaret, daughter of William Brent of Charing in Kent, without any children. He married thirdly, about June 1519, Mary, youngest daughter of Edward Stafford, 3rd Duke of Buckingham, and his wife Eleanor Percy, with whom he had three sons and five daughters:
Margaret Nevill, who married first John Cheney and secondly Henry Poole of Ditchling.
Dorothy Nevill, who married, as his first wife, William Brooke, 10th Baron Cobham, with whom she had a daughter, Frances Brooke, who married first Thomas Coppinger, and secondly Edward Becher.
He married fourthly his mistress Mary Brooke, the aunt of his son-in-law William Brooke, who was pregnant at his death. with a daughter whose name is unknown. Mary was the daughter of Thomas Brooke, 8th Baron Cobham, and his first wife Dorothy, daughter of Sir Henry Heydon, of Baconsthorpe, and his wife Anne, daughter of Sir Geoffrey Boleyn of Hever. This made her a second cousin of Queen Anne Boleyn.
