Dick Van Dyke reacted emotionally when he heard the music Maria Poppins for the first time.

The actor, now 98, sat down for an interview as part of the ABC News Studios special The Untold Story of Mary Poppins: A Special Edition of 20/20timed to coincide with the 60th anniversary of the iconic Disney film.

In a clip shared exclusively with PEOPLE, Van Dyke recalls crying the first time the Sherman Brothers played the now-iconic songs for him.

“I couldn’t believe it, one tune after another,” he says. ‘I cried. It was just the most beautiful thing I had ever heard.”

Van Dyke famously played a chimney sweep named Bert in the 1964 film, opposite Julie Andrews as the titular magical nanny. Maria Poppins won five Oscars, including Best Actress for Andrews, now 89, plus Best Original Score and Best Original Song (“Chim Chim Cher-ee”) for the Sherman Brothers, Richard and Robert.

Some of the memorable songs from the movie musical include ‘A Spoonful of Sugar’, ‘Jolly Holiday’, ‘Step in Time’ and ‘Let’s Go Fly a Kite’.

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During the interview, Van Dyke recalled working with Walt Disney, who died in 1966. “When I met Walt, we hit it off right away. We both admitted that we were pretending to be adults and still being kids,” he said.

“I went to his office and he had watercolors of all the scenes in the movie. By the time we finished, I was so excited.”

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The two hours Untold Story of Mary Poppins special features rare images, photos and stories from the living legends, and it’s part of a two-night event.

The Untold Story of Mary Poppins: A Special Edition of 20/20 airs on Wednesday, November 27 at 9pm ET and streams the next day on Hulu and Disney+. The Wonderful World of Disney will then present a broadcast of Maria Poppins.