'Interstellar' Premiere: Christopher Nolan's "Love Letter" Takes Flight

Jessica Chastain
Associated Press

The actress posed for photographers on Hollywood Boulevard.

"I think it's a love letter. At the core of the film, it's about a father and his daughter," says Jessica Chastain

Christopher Nolan's Interstellar takes the characters of Mathew McConaughey and Anne Hathaway to space, but the entire cast firmly believes that its really a film about the most important human emotions and bonds.

"I thought it was going to be a space adventure film, but it's beyond that," Jessica Chastain told The Hollywood Reporter at the film's Hollywood premiere, which featured a black carpet. "At the heart of it, it's about love; it's about a father and daughter."

"Chris and Matthew are both fathers, and I think for Chris, being a father, this story was very close to him," adds the actress, who plays a scientist back on Earth trying to find a way to save humankind.

See more The Hollywood Reporter's Full 'Interstellar' Discussion With Christopher Nolan, Stars

The story follows McConaughey's and Hathaway's characters as they head into space trying to find a new home for the human race. McConaughey's character leaves behind a young daughter and son.

The Dallas Buyers Club Oscar winner told THR that the shoot, which took his character to space, new planets and on life-threatening adventures, was very challenging. After he'd finished working on it, he said he "took a long, long, long nap."

"I rested my body, and I rested my mind. I rested for about 10 days, because it was a long journey we went on," he said. "It was hard. It was supposed to be hard."

At the premiere at the TCL Chinese Theatre on Sunday, McConaughey, Nolan, Chastain and Hathaway were joined by Wes Bentley, David Gyasi, Mackenzie Foy, Hans Zimmer, Paramount's Brad Grey and Warner Bros.' Kevin Tsujihara. After the screening, the cast and guests enjoyed an afterparty at the Dolby Theatre, which even featured a slowly rotating central bar.

Nolan's brother, Jonathan Nolan, had originally been commissioned to write the screenplay for Steven Spielberg. When his brother signed on to direct, Jonathan knew "he would bring a unique spin to it and would execute it on the biggest possible scale."

"He and Steven have that in common — a commitment to make films the old-fashioned way, which is to say on the biggest possible level," he told THR.

By the time the Paramount and Warner Bros. film was finally finished, Jonathan Nolan, who had been working on it for eight years, had another thing in common with his brother and star McConaughey: he was a father.

"The film is about parents and their children," he said. "When I started writing it, I didn't have any kids. Now I have a little girl who is a year old, so watching the film is a completely different emotional experience for me."

Interstellar hits U.S. theaters on Nov. 7.