[1][2] Her mother, Martha Elizabeth Telfer, died two and a half months after Sandra's father was killed.
[3] After her parent's deaths, she was raised by her paternal uncle Campbell Seagram.
[3] She was educated at Branksome Hall, a private girls' school in Toronto.
On 17 July 1958, when she was 20 years old, Seagram became the last debutante to be presented at the Court of St James's.
[7] In 1959, Seagram married Italian Eugenio Annovazzi and settled in Rome.