Oliver Platt, Actor: X-Men: First Class. Oliver Platt was born in Windsor, Ontario, to American parents, Sheila Maynard, a social worker, and Nicholas Platt, a career diplomat. His parents were both from upper-class families, and his maternal great-grandmother, Cynthia Roche, was the sister of Princess Diana's maternal grandfather, Maurice Roche. Platt spent his childhood in Washington DC, Asia, and the middle east. Oliver graduated with...