Sir Paul McCartney, the legendary pop icon has racked up a staggering 300 million record sales from his Beatles days and another 67 million solo, might appear to have nothing left to prove. Yet, it turns out he's rather particular about how he's presented ons screen.

Thomas Brodie-Sangster, who played Sir Paul in Sam Taylor-Johnson's John Lennon biopic 'Nowhere Boy', revealed to The NME that McCartney had an issue with the casting. He was told about the complaint by the film's director. The actor said: "The one comment I did get was that he didn't like the fact that Aaron Taylor-Johnson, who played John, was taller than me, because he said that wasn't the case!"

Nowhere Boy, inspired by a book from John Lennon's half-sister Julia Baird, charts the formative years of the Beatles through Lennon's eyes.

In her directorial debut, Sam Taylor-Johnson chose 5'11" Aaron Taylor-Johnson, whom she would later wed, for the lead role. Although Brodie-Sangster stands just one inch shorter but that upset Sir Paul, who, like his former songwriting companion, was around 5'11" himself.

Sir Paul's concerns may only deepen with the casting choices for the four new Beatles films on the horizon, directed by Bond maestro Sir Sam Mendes and slated for release in 2028.

Each film will delve into the life of one member of the Fab Four.Barry Keoghan is set to embody the affable drummer Sir Ringo Starr, while Joseph Quinn will take on the role of the reserved, youngest Beatle, George Harrison. Paul Mescal, star of Gladiator II, is reported to be approximately the same height as Sir Paul, while Harris Dickinson, who will portray John Lennon, stands just over 6'2".

The quartet of films are slated for a simultaneous release in April 2028, a move that Sony studios chief Tom Rothman has dubbed "the first bingeable theatrical experience."

Mendes has already obtained the crucial approval from the band's company, Apple Corps, but it remains uncertain how the band's highly influential bassist will react to seeing his old friend and rival towering over him on set.

Industry authority Variety has already labelled the four interconnected films as "one of the biggest bets in movie history," with filming alone anticipated to span an entire year.

Mendes, known for his work on Bond blockbusters Skyfall and Spectre, believes that a streaming mini-series wouldn't do justice to his story of "the greatest band in history" and that it's also "too huge to fit into a single movie."

Instead, he's following something like Marvel's Avengers strategy and creating a series of interlinked films focusing on each band member – tracing their journey from their modest beginnings in post-war Liverpool, through the gritty clubs of Hamburg, and onto the global stage as arguably the most influential pop band of all time.

Addressing a gathering of cinema executives last week, he stated: "We need big cinematic events to get people out of the house."