Phoebe Waller-Bridge 'scared the crap out of' Harrison Ford on the 'Indiana Jones' set by wearing a mask of his face and hiding in his trailer

• Phoebe Waller-Bridge and Harrison Ford pranked each other on the "Indiana Jones" set.

• The "Fleabag" star wore a mask of Ford's face and hid in his trailer.

• But the "Indiana Jones" and "Star Wars" alumni got his revenge by wearing a mask of his costar's face.

"Indiana Jones and the Dial of Destiny" brings Harrison Ford back to the big screen as the titular adventurer-archaeologist, and he's joined by an impressive cast that includes the likes of "Hannibal" star Mads Mikkelsen and Boyd Holbrook.

But his latest partner-in-crime is none other than "Fleabag" and "Solo" star Phoebe Waller-Bridge, who plays Indy's goddaughter, Helena Shaw.

The pair's mission in the 2023 sequel is to find an ancient dial before former-Nazi-turned-NASA scientist Jurgen Voller (Mikkelsen) can get his hands on it.

It sounds like that sense of fun and adventure was also present off-camera during filming, as Waller-Bridge told Entertainment Weekly in a new interview published Tuesday that she and Ford had "a lot of fun" on set.

The British star recalled: "From the moment we met, it was 'shithead's all round. We were taking the piss out of each other all the time, and having a lot of fun."

Waller-Bridge went on to say that she was impressed by Ford's determination and work ethic but added that "there were a lot of pranks... Lots of pranks."

The article goes on to explain that Waller-Bridge hid in Ford's trailer while wearing a mask of his face that was made specifically for the opening sequence in which the 80-year-old actor appears digitally de-aged.

"It scared the crap out of him, actually. Even though that 'actually' is only represented by him blinking three times and saying, 'Get the hell out of my trailer,'" Waller-Bridge said.

The "Star Wars" actor apparently got his revenge 20 minutes later by sneaking up on his costar by wearing a mask of her face and tying his shirt in a bow to mimic her character, Helena.

Ford noted: "I didn't think of it as a 'prank.' But yes, I mean, we spent a lot of time fooling around."

"Indiana Jones and the Dial of Destiny" is in theaters Friday.

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