In casting news that absolutely nobody expected, Paul McCartney has reportedly slipped aboard Disney's "Pirates of the Caribbean: Dead Men Tell No Tales."

That's according to Deadline, which contends directors Joachim Ronning and Espen Sandberg decided after wrapping principal photography that they needed "an extra big set-piece scene" -- one built around the 73-year-old music icon. Although the website could dig up no details about McCartney's role, it insists the set piece isn't a re-shoot, but rather an extra scene.

We can only hope it also involves Keith Richards, who has played Jack Sparrow's father Captain Teague since 2007's "Pirates of the Caribbean: At World's End."

The fifth installment of Disney's blockbuster franchise, "Dead Men Tell No Tales" sees Johnny Depp return to the role of Jack Sparrow, joined by Geoffrey Rush, Brenton Thwaites, Kaya Scodelario, Kevin McNally, Stephen Graham and Orlando Bloom. The film opens May 26, 2017.