The actor explained that playing idealistic cop John Blake in Christopher Nolan's final Batman film is the fulfilment of a childhood dream.
"It was a delight and an honour. I've been a fan of Batman since I was 4 years old, I think everybody has! He's the cool super hero, he wears black," Gordon-Levitt joked, reports Flicks and Bits.
He continued: "I've [also] been a fan of Christopher Nolan's work since Memento came out in theatres. I remember when Batman Begins came out and I said to myself, 'Oh, the filmmaker who made Memento is now doing a Batman movie, that's interesting. I'll go see that!'
"I hadn't seen the last few Batman movies before that. But with Batman Begins, I loved it. And then The Dark Knight was just one of the coolest things I've ever seen. I was so grateful to be a part of it."
"John Blake, he's the kind of guy who probably always wanted to be a cop and dedicates himself to being excellent at his job. He's someone who truly believes in what he does and I admire that in anybody," the star explained.
"In the midst of a lot of cynicism, he remains proud to be a police officer."
Nolan recently described Gordon Levitt's Dark Knight Rises co-star Marion Cotillard as a "challenging" actress.
The Dark Knight Rises is released on July 20. Watch a trailer below: