Eagle-eyed fans spotted a glaring movie mistake left in the final trailer for The Devil Wears Prada 2, which dropped on Monday.

When Runway's new fashion editor Andrea 'Andy' Sachs (Anne Hathaway) strutted through a busy crosswalk, a photobomber emerged from the distance.

A woman could clearly be seen hanging her arm out of a yellow taxi van, filming the 43-year-old Oscar winner on her iPhone.

And while everyone else on the crosswalk were probably paid extras, director David Frankel and his crew couldn't control the general public in the background while on location.

For instance, on August 5, a photographer caught a crowd dining alfresco while rubber-necking Hathaway and her onscreen leading man Patrick Brammall, who portrayed Peter, as they shot a date scene.

'This girl having her phone just wide out the window in the trailer is frying me,' X user @filmsactress tweeted.

X user @supremesappho wrote: 'People will say she's a first timer tourist in New York.'

'I mean, we all would,' X user @LilyBrookeh tweeted.

'Because that's Andy Sachs,' X user @rudyfunkmeyer agreed. 'A million girls would kill for that job!'

X user @INS0MNlATlC tweeted: 'But that's very tourist in NYC core.'

'And the camera captured her completely LOL!' X user @KingbossaVibez wrote.

The other thing that got noticed in the preview for the highly-anticipated sequel was the song playing in the background, which was pop star Lady Gaga and rapper Doechii's upcoming duet Runway.

The 40-year-old Mother Monster also appears onscreen in The Devil Wears Prada 2 during a scene shot in Milan, but it's unclear if she played a character or a thinly-veiled version of herself - according to Variety.

The 20th Century Studios comedy also features Meryl Streep, Stanley Tucci, Emily Blunt, Justin Theroux, Kenneth Branagh, Lucy Liu, Pauline Chalamet, B. J. Novak, Rachel Bloom, Sydney Sweeney, Donatella Versace, Ciara and Ashley Graham.

The Devil Wears Prada 2 - which had an eye-popping $150 million budget - will be released in US/UK theaters on May 1.

The original 2006 film - a big-screen adaptation of Lauren Weisberger's 2003 novel - earned rave reviews and amassed $326.7 million at the global box office from a $41 million budget.

Original director, writer Aline Brosh McKenna, producers Wendy Finerman and Karen Rosenfelt, cinematographer Florian Ballhaus, makeup department head Nicki Ledermann and music supervisor Julia Michels all returned for the continuation.

However, costume designer Patricia Field was replaced by her former associate Molly Rogers for the second time after HBO Max's SATC continuation, And Just Like That.