The two-time Oscar winner disclosed to Variety that she engaged in romantic encounters with women "many times."
The topic of sexuality came up when the mother-of-four started discussing her role in the upcoming film Carol, based on the 1952 Patricia Highsmith novel The Price of Salt. The film, set in 1950s New York, is about a female department-store clerk (Rooney Mara) who dreams of a better life and falls for an older, married woman (Blanchett).
When asked if this was her first turn as a lesbian, Blanchett-- who's married to playwright Andrew Upton -- said with a smile, "On film -- or in real life?"
But when it comes to defining her sexuality, Blanchett rejects any labels. “I never thought about it,” she said, comparing herself to her on-screen character. “I don’t think Carol thought about it.”
As for how she prepared for her new role, she shared that she read "a lot of girl-on-girl books from the period."
The 45-year-old actress also admitted that she refuses to Google herself or even join Twitter. "I think I'd end up in rehab," she said. "That stuff is addictive."
Blanchett's Carol is to premiere Sunday at the Cannes Film Festival.