Sean Patrick Paul O'Sullivan CM (1 January 1952– 9 March 1989), was a Canadian politician who left politics to become a Roman Catholic priest.
This movement was formed in Ottawa to engage the support of Canada's young conservatives for John Diefenbaker at the leadership convention.
At 20 years and 10 months, O'Sullivan became the youngest member elected to the House of Commons of Canada at that time.
It was O'Sullivan's private member's bill in 1975 that gained recognition for the beaver as Canada's official animal symbol.
With the return of his illness in 1989, O'Sullivan entered Princess Margaret Hospital in Toronto for a bone marrow transplant.