Lady Sophia Hamilton is engaged to marry Hashem Arouzi, son of Mrs. Firouzeh Rastegar, of Lausanne, Switzerland, and the late Alireza Arouzi.
Arouzi is the founding partner of Gottex Fund Management. He also served as Portfolio Manager at Kleinwort Benson Private Bank Ltd.
He received a BA in International Relations from the University of Virginia.
Lady Sophia is the daughter of the Duke and Duchess of Abercorn, who live in County Tyrone, Northern Ireland.
The engagement was announced in Friday's Times.
Arouzi, who was born in 1971, is a member of the Board of Trustees of the Iran Foundation in London.
Lady Sophia's first marriage to journalist Anthony Loyd ended in divorce in 2005 after only three years. She is a dress designer.