Mandy Moore, the star of "This Is Us", is stunned: she is best known for her projects

Mandy Moore plays Rebecca Pearson in the NBC drama "This Is Us".

(AP)

Mandy Moore is tearing up millions of fans watching her hit drama, "This Is Us," and the actress admits she has become a pro in the draw.

Aged 34, she remembers taking the lead role in "A Walk to Remember" while she was only a teenager during an appearance on the movie "The Tonight Show starring Jimmy Fallon" on Monday.

"This film has touched people and continues to be, as we never imagined," said Moore at the end of the evening, adding that he was "totally flattered".

Moore played a teenager with leukemia in the 2002 film, adapted from a novel by Nicholas Sparks.

Now Moore plays the role of Rebecca Pearson in the third season of the NBC show "This Is Us".

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She admitted to being "slightly flabbergasted", she began to make a name for herself in the entertainment world for "making people cry".

"I would never have guessed that in a million years," Moore commented.

Fall on insisted that the former pop star had more to offer.

"No, and sing and dance," he says. "Come on, what are you talking about?

Later, Moore gave details on what to expect from the third season of "This Is Us", which will begin Tuesday night.

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"The court of Jack and Rebecca is sort of what is explored for the first half of the season," she said, referring to her husband on the screen, played by Milo Ventimiglia.

"So it's fun," she admitted. "I have the impression of smiling, laughing and having fun. I cried all the humanly possible tears last season, then.