Frank Stuart Miller was a Canadian politician who served as the 19th premier of Ontario for four months in 1985. He was elected to the Legislative Assembly of Ontario in 1971 as a Progressive Conservative member of the central Ontario riding of Muskoka. He served in the cabinet of Premier Bill Davis in several portfolios including Minister of Health and Minister of Natural Resources. He also served five years as the Treasurer of Ontario.

The Progressive Conservative Party of Ontario, often shortened to the Ontario PC Party or simply the PCs, colloquially known as the Tories, is a centre to centre-right political party in Ontario, Canada.