Muriel Guilbault (February 18, 1922 â January 3, 1952) was a Canadian actress and comedian. She was also a cosigner of the Refus Global, an artistic manifesto published in 1948, with the support of fifteen co-signers including painters Jean-Paul Riopelle, Claude Gauvreau, Pierre Gauvreau, Marcel Barbeau and Marcelle Ferron. She was the sister of actress .