Just whistle while you work.

Rachel Zegler took to social media on Monday, March 24, to celebrate “Snow White” being the weekend’s top box office performer – even despite a sleepy debut and lazy ticket sales.

“#1 MOVIE IN THE WORLD!” Zegler, 23, wrote alongside a photo of her dressed as the titular Disney princess while waving from a trailer on the film’s set. She also included a red apple emoji and a snowflake emoji.

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Rachel Zegler took to Instagram on Monday, March 24, to celebrate “Snow White” and its opening weekend.Instagram/@rachelzelger
Even though “Snow White” came out on top at the box office over runner-ups like “Captain America: Brave New World” and “Mickey 17,” the fairy tale remake is still in trouble when considering its $270 million budget.

According to The Hollywood Reporter, “Snow White” failed to meet opening box office expectations over the weekend. While Disney reportedly hoped to clear $100 million, the live-action remake fell short and only garnered a combined domestic and international total of $87.3 million as of Sunday.

Final weekend numbers are not expected to come in until late Monday.

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The actress posted a picture of her dressed in her “Snow White” costume and waving from a trailer on the Disney movie’s set.Instagram/rachelzegler
Meanwhile, the film – which opened at $43 million domestically – underperformed when compared to the $45 million domestic total it was projected to rake in.

Even The Post’s movie critic, Johnny Oleksinski, dubbed the live-action remake of the animated 1937 Disney classic “boring” and “mediocre.”

“The timeless classic, a groundbreaking achievement for animation, has been turned into another pointless and awkward live-action automaton that vanishes from your mind the second it’s over,” he wrote ahead of the movie’s debut weekend.

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Zegler, as the titular Disney princess, stars in “Snow White” opposite Gal Gadot’s Evil Queen.©Walt Disney Co./Courtesy Everett Collection

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Initial ticket sales from its opening weekend suggest “Snow White” won’t reach $100 million.AP
The disappointing box office numbers and Zegler’s optimistic Instagram post come as the film and its stars continue to be dogged by backlash and alleged behind-the-scenes drama.

Not only did “Snow White” suffer criticism for using CGI to create the film’s seven dwarfs, but Zegler and her Evil Queen co-star Gal Gadot, 39 created controversy after voicing opposing views about the Israeli-Hamas conflict still unfolding in Gaza.

That drama reportedly created tensions between the stars themselves, and Zegler later left Gadot out of a tribute she posted for the movie.

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Zegler and Gadot reportedly suffered drama behind-the-scenes of the latest Disney remake.éWalt Disney Co./Courtesy Everett Collection
“[Zegler] has nothing in common with Gal Gadot, a mom of four kids,” an insider told People earlier this month regarding the two “Snow White” co-stars.

“On top of that, their political views differ, adding to the tension,” the source added.

Zegler also previously came under fire for calling the original “Snow White” movie “dated” and “weird.”

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Zegler left Gadot out of this cast picture she posted to Instagram alongside a touching “Snow White” tribute.Instagram/@rachelzelger
“The original cartoon came out in 1937 and very evidently so,” she said shortly after landing the main role in the remake.

“There’s a big focus on her love story with the guy who literally stalks her. Weird, weird,” the “West Side Story” star added. “So we didn’t do that this time.”

Zegler later backtracked and called the role an “honor of a lifetime.” She also dubbed herself a “huge Disney fan.”

“It was the honor of a lifetime. I think every young person dreams about a phone call like that,” the actress told “Good Morning America” on March 20. “This one is certainly extra special as a huge Disney fan.”