Anne Hathaway may be all smiles now that her performance in "Les Miserables" is earning Oscar buzz, but she admitted that it's a "miracle" that her marriage survived the filming of the epic musical.

The extreme weight loss she underwent to portray the sickly Fantine, as well as the dark nature of the role, caused her to become "manic," Hathaway revealed on Chelsea Lately Monday night. She admitted to picking a fight with husband Adam Shulman when he didn't want to watch a sunset with her.

"I'm like, 'Honey, it's the most incredible sunset you've ever seen, we have to go outside right now and see it.' And he was like, 'Honey, I'm on a business call,'" Hathaway said. "And I was like, 'Fine. That's great for you.'"

But Hathaway said she eventually asked Shulman to go home while she finished up the shoot in London because he was preventing her from going deeper into her role.

"I needed to go further into that negative place to play my character, and I love him so much that I was like, 'You're making me happy. You're keeping me up and I'm clawing to the sides of my life and I need to fall into a pit and you need to go, honey,'" Hathaway said.

Hathaway married Shulman, an actor and jewelry designer, in September after four years of dating.

Watch the video above for more on how "Les Miserables" affected Hathaway's marriage.

Click through the slideshow below to see photos from the "Les Miserables" premiere.

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  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Hugh Jackman arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Russell Crowe, Anne Hathaway, Amanda Seyfried and Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Amanda Seyfried, Anne Hathaway and Samantha Barks arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Eddie Redmayne arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Eddie Redmayne arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Cast and crew including Samantha Barks, Isabelle Allen , Hugh Jackman, Anne Hathaway, Eddie Redmayne, Amanda Seyfried, Daniel Huttlestone, Sacha Baron Cohen, Russell Crowe and Cameron Mackintosh arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Samantha Barks, Cameron Mackintosh and guest, Isabelle Allen, Hugh Jackman, Anne Hathaway, Eddie Redmayne, Amanda Seyfried, Daniel Huttlestone, Sacha Baron Cohen and Russell Crowe arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Amanda Seyfried, Anne Hathaway, Samantha Barks

    From left, actors Amanda Seyfried, Anne Hathaway and Samantha Barks pose for photographers as they arrive at the premiere of Les Miserables at a cinema in central London, Wednesday, Dec. 5, 2012. (Photo by Jon Furniss/Invision/AP)

  • Les Miserables World Premiere - London

    Amanda Seyfried and Eddie Redmayne arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Amanda Seyfried arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Hugh Jackman arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Matthew Morrison arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Frances Ruffelle arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Frances Ruffelle and Cameron Mackintosh arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Cameron Mackintosh arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Daniel Huttlestone arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Russell Crowe

    Actor Russell Crowe poses for photographers as he arrives at the premiere of Les Miserables at a cinema in central London, Wednesday, Dec. 5, 2012. (Photo by Jon Furniss/Invision/AP)

  • Helena Bonham Carter

    Helena Bonham Carter poses for photographers as she arrives at the premiere of Les Miserables at a cinema in central London, Wednesday, Dec. 5, 2012. (Photo by Jon Furniss/Invision/AP)

  • Eddie Redmayne

    Eddie Redmayne poses for photographers as he arrives for the premiere of Les Miserables at a cinema in central London, Wednesday, Dec. 5, 2012. (Photo by Jon Furniss/Invision/AP)

  • Hugh Jackman, Anne Hathaway

    Actors Anne Hathaway and Hugh Jackman pose for photographers as they arrive at the premiere of Les Miserables at a cinema in central London, Wednesday, Dec. 5, 2012. (Photo by Jon Furniss/Invision/AP)

  • Les Miserables World Premiere - London

    Eddie Redmayne arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Samantha Barks arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Isabella Allen arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actress Samantha Barks attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actress Isla Fisher attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actors Russell Crowe, Anne Hathaway, Hugh Jackman and Amanda Seyfriend attend the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actors Sasha Baron Cohen and Isla Fisher attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actress Anne Hathaway attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actor Hugh Jackman attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actress Amanda Seyfried attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables - World Premiere

    LONDON, ENGLAND - DECEMBER 05: Actor Hugh Jackman attends the 'Les Miserables' World Premiere at the Odeon Leicester Square on December 5, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

  • Les Miserables World Premiere - London

    Amanda Seyfried, Anne Hathaway and Samantha Barks arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Amanda Seyfried, Anne Hathaway and Samantha Barks arrive at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Russell Crowe, Anne Hathaway, Amanda Seyfried and Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

  • Les Miserables World Premiere - London

    Anne Hathaway and Hugh Jackman arrives at the premiere of Les Miserables at the Empire Leicester Square, London, UK

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