Interstellar may not be much of a departure for director Christopher Nolan, who gave us the sci-fi blockbuster Inception between The Dark Knight and The Dark Knight Rises, but it certainly is a big step for Matthew McConaughey. The actor is in the midst of a career renaissance, fresh off his Oscar-nominated turn in Dallas Buyers Club, returning to big-budget fare with this outer space thriller, which hits theaters November 7. There is still much we don't know about Interstellar, but the actor revealed that this project is the director's most ambitious to date, in a recent interview.

The story centers on a group of explorers who use newly-discovered wormholes to expand our knowledge on space travel, science and technology. While Matthew McConaughey wouldn't divulge any specific plot details, he teased that it is by far the biggest project the filmmaker has ever done.

"Here's what I can tell you. It's the most ambitious thing he's ever done. And he's done some ambitious stuff."

The actor also talked about his first meeting with Christopher Nolan, where the filmmaker praised his work in Mud, before being asked to fly to Los Angeles to meet at his house.

"He came up to me and said, 'Mud. I love that movie.' (Later) I sat down with him for about 2 1/2 hours at his house. Not one word came up about Interstellar. I walked out not sure what to think. I mean, he's not a guy who takes general meetings."

Christopher Nolan himself also spoke about the actor's work ethic on the set.

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"Matthew works from the inside out. He approaches a character from a deep human understanding, refusing to take shortcuts to an emotional connection with the audience - all while never losing sight of the demands of the overall narrative."

While one wouldn't expect a Christopher Nolan movie to be a lighthearted affair on the set, Matthew McConaughey spoke about how serious the mood on the set was.

"There's no f---ing around on set. He's a great problem solver. In that way, he's very indie. Here's a guy who could have whatever budget he wants - and we finished shooting early."