The 'Lion King' cast had to follow these royal protocol rules before greeting Prince Harry and Meghan Markle

While Beyoncé might be American royalty, the "Lion King" cast still had to follow protocol upon meeting Prince Harry and Duchess Meghan Markle.

Disney's "Lion King" held its European premiere in London on Sunday, where Harry and Meghan walked their first red carpet as a couple. The star-studded movie cast, including Beyoncé, Seth Rogen, Billy Eichner and more, were all in attendance as they awaited the royal couple.

SEE ALSO: When Meghan Markle met Beyoncé at the 'Lion King' premiere

“You’re given a lot of protocol to follow which is unusual,” Rogen revealed during a recent appearance on UK’s This Morning. “Respect their personal space. They’re the only people I’ve met who come with protocol so that was interesting. And then I think what we were trying to gauge is how many people were following the protocol and how strict the protocol is.”

“I assume you get put in the Tower Of London if it all goes wrong. I’ve got to think of the repercussions. I’d like to come back here one day,” he added.

Eichner, who plays Timon in the live action film, explained, "like Seth said, they tell you you’re supposed to say your Royal Highness, you can’t speak until your hands are locked together in a handshake and all these crazy things, and I didn’t know how much you were supposed to follow that so I started panicking. We were watching what our friend Keegan [Keegan-Michael Key] did and he did none of the protocol either and just kind of nodded his head, then it all fell apart.”

The "Billy on the Street" host took to his Instagram to share a video of his nerves upon meeting the royals. 

"Caught on video last night completely freaking out to @sethrogen about how to greet Prince Harry and Meghan," he captioned the clip.

During the premiere, Duchess Meghan was reportedly overheard telling Pharrell, who produced several songs for "The Lion King," that royal life isn't 'easy.'

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Meghan Markle attends The Lion King premiere
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Meghan Markle attends The Lion King premiere
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
Britain's Prince Harry, Duke of Sussex (L) and Britain's Meghan, Duchess of Sussex (R) arrive to attend the European premiere of the film The Lion King in London on July 14, 2019. (Photo by Niklas HALLE'N / POOL / AFP) (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, UNITED KINGDOM - 2019/07/14: Prince Harry, The Duke of Sussex and Meghan, Duchess of Sussex attend the European Premiere of Disney's The Lion King at the Odeon Luxe cinema, Leicester Square in London. (Photo by Keith Mayhew/SOPA Images/LightRocket via Getty Images)
LONDON, ENGLAND - JULY 14: Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
Prince Harry and Meghan, Duchess of Sussex, attend the European film premiere of Disney's 'The Lion King' at Odeon Luxe Leicester Square on 14 July, 2019 in London, England (Photo by WIktor Szymanowicz/NurPhoto via Getty Images)
LONDON, ENGLAND - JULY 14: Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Meghan, Duchess of Sussex attends "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JULY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex greet US singer-songwriter Beyoncé and and US rapper Jay-Z at the European Premiere of Disney's "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by Niklas Halle'n-WPA Pool/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex chat with young children of Disney executives at the European Premiere of Disney's "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by Niklas Halle'n-WPA Pool/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex greet Disney CEO Robert Iger US singer-songwriter Beyoncé at the European Premiere of Disney's "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by Niklas Halle'n-WPA Pool/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex chat with US film director Jon Favreau at the European Premiere of Disney's "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by Niklas Halle'n-WPA Pool/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex arrive to attend the European Premiere of Disney's "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by Niklas Halle'n-WPA Pool/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex (L) chats with Disney CEO Robert Iger as Meghan, Duchess of Sussex (2nd R) embraces Beyonce Knowles-Carter (R) as they attend the European Premiere of Disney's "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by Niklas Halle'n-WPA Pool/Getty Images)
Britain's Prince Harry, Duke of Sussex (2nd L) and Britain's Meghan, Duchess of Sussex (L) chat with US film director Jon Favreau (C) as they arrive to attend the European premiere of the film The Lion King in London on July 14, 2019. (Photo by Niklas HALLE'N / POOL / AFP) (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
Britain's Prince Harry, Duke of Sussex (centre left) and Britain's Meghan, Duchess of Sussex (centre right) arrive to attend the European premiere of the film The Lion King in London on July 14, 2019. (Photo by Niklas HALLE'N / POOL / AFP) (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
Britain's Meghan, Duchess of Sussex (L) meets cast and crew, including US singer-songwriter Beyoncé (C) and her husband, US rapper Jay-Z (R) as she attends the European premiere of the film The Lion King in London on July 14, 2019. (Photo by Niklas HALLE'N / POOL / AFP) (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
Britain's Prince Harry, Duke of Sussex (C) and Britain's Meghan, Duchess of Sussex (R) arrive to attend the European premiere of the film The Lion King in London on July 14, 2019. (Photo by Niklas HALLE'N / POOL / AFP) (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
LONDON, ENGLAND - JULY 14: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend "The Lion King" European Premiere at Leicester Square on July 14, 2019 in London, England. (Photo by Dave J Hogan/Getty Images)
LONDON, ENGLAND - JULY 14: Meghan Duchess of Sussex attends the European Premiere of "The Lion King" at Odeon Luxe Leicester Square on July 14, 2019 in London, England. (Photo by David M. Benett/Dave Benett/WireImage)
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