The French actress said that she used the online resource to get an audition for Bond Girl Séverine in Daniel Craig's latest 007 outing.
"It's very difficult in France to get access to castings when you don't have any relationships," she told Empire.
"I totally heard by chance that they were doing the casting for a James Bond movie, and that one of the auditions was taking place in Paris. So I tried myself to contact every name involved in the movie I could possibly find on the IMDb!
"I finally managed to get the first audition in Paris, then I did the second in London with Sam Mendes, and then the third was with Sam and Daniel Craig, again in London. And then I was cast!"
Marlohe added that her favourite Bond actress is Famke Janssen, who played femme fatale Xenia Onatopp in GoldenEye.
"She was so funny, so bold and so interesting!" she commented. "When you see all the Bond Girls, they have actually been very varied. So I'm working on creating a character as I would for any movie, which is to make her interesting for me."
> Daniel Craig slips back into blue trunks for Skyfall
> Skyfall films in London - on-set pictures
View photos of Bérénice Marlohe, Daniel Craig and the cast of Skyfall below: