The crush wasn’t mutual, but that may just be because the 49-year-old actress didn’t know who Bloom was for a large portion of her three weeks on set.
"I didn’t recognize you, because the first time I saw you, you had hair -- like Fabio hair and blue eyes," Blanchett recalled. "And then I just saw you -- who is this really cute guy out of drama school -- and I didn’t put two and two [together]."
Bloom chimed in, "And I was just walking around spying on her from the corner of the room -- in a non-creepy way."
The Pirates of the Caribbean star currently has his eye on someone else -- Katy Perry, his long-time on-again, off-again girlfriend.
"They know each other’s patterns and the communication between them has improved, so their relationship is thriving," a source exclusively told ET back in May of the couple, who recently enjoyed a date-night in London. "They are happier than they've ever been and feel in time they will be ready to be more public about their love for one another and can plan for a future."
The source continued: "They are talking about a future wedding, but they are taking it slow."