Diana Leblanc (born 1943) is a Canadian television and film actress, best known to US audiences for her portrayal of Frannie Halcyon in the TV miniseries More Tales of the City (1998) and its follow-up Further Tales of the City (2001). These miniseries were sequels to Tales of the City (1994), which starred Nina Foch in the role of Frannie.
Leblanc was born in Montreal and enrolled in the French program at the National Theatre School of Canada, switching to the English program in her second year. She was a founding member of the Soulpepper Theatre Company in Toronto and a member of the Neptune Theatre company in Halifax. Leblanc was artistic director for the Théâtre français de Toronto.
She had roles in the films Mahoney's Last Stand, Lies My Father Told Me and The Third Walker and the television series Swiss Family Robinson. She played Grace Elliott, the mother of Pierre Trudeau, in the 2005 television miniseries Trudeau II: Maverick in the Making. She also appeared in the television series North of 60.
As a director, she has worked not only in the theatre but in radio, directing 75 one-minute radio dramas for the Bronfman Heritage Minutes series, when it evolved from film into radio. Leblanc has directed at the Stratford Shakespeare Festival including a 1994 production of Long Day's Journey into Night, at the National Arts Centre in Ottawa, at the Segal Centre for Performing Arts in Montreal and at the Tarragon Theatre in Toronto. She has also directed productions for the Canadian Opera Company, Calgary Opera, Pacific Opera Victoria and the International Opera Centrum in Amsterdam. She continues to work in Toronto theatre as a director.