He was born at Great Marlow, Berkshire, the third son of Sir Alexander Hope, and grandson of the second earl of Hopetoun.
At this time he was making a very large income at the Parliamentary bar, He only commenced serious practice in this branch of his profession in 1843, but by the end of 1845 he stood at the head of it and in 1846 was made a Queen's Counsel.
In 1847 he married Miss Lockhart, granddaughter of Sir Walter Scott, and on her coming into possession of Abbotsford House six years later, he assumed the surname of Hope-Scott.
It was here, down the staircase to the great ballroom of the Bellevue-Stratford Hotel, that Hope Montgomery, in ballgown and elbow-length white kid gloves, made her entrance as a debutante in 1922.
As a young wife, HopeScott began to feature on the New York Couture Group's annual list of best-dressed women, and patronised the salons of many famous names, both in New York and Paris, such as Mainbocher, Falkenstein and Piguet.
One night John was prevented from climbing into her bed by the presence of a bolster beside her, which he angrily mistook for a fellow painter staying in the house.