The Queen star is tipped in the Leading Actress category for her portrayal of Alfred Hitchcock's wife Alma Reville in the project, which features Sir Anthony Hopkins as the legendary director.
And Mirren is praying her name is called out at the London ceremony on Sunday (10Feb13) - because the film needs extra promotion due to its small budget.
She tells the BBC, ""Awards are important for a movie, especially for a small, low-budget movie like this one, although it doesn't look it.
""These kind of movies don't have huge marketing budgets, so awards are very important because they draw attention. We make movies because we want people to see them.""
Mirren faces tough competition for the award - Emmanuelle Riva (Amour), Jennifer Lawrence (Silver Linings Playbook), Jessica Chastain (Zero Dark Thirty) and Marion Cotillard (Rust And Bone) are also nominated.