An actor, who voices many iconic characters on The Simpsons, tested out just how "impenetrable" the King's Guards are by trying to make them laugh with his characters.
Hank Azaria is a critically acclaimed American actor, recognised for his numerous voice roles on "The Simpsons" since 1989 – including Moe Szyslak, Chief Wiggum, and Comic Book Guy.
The 60-year-old may also be recognised by fans of the Friends sitcom as Phoebe's (Lisa Kudrow) "scientist guy" love interest David.
But the actor has recently gone viral on social media after he paid a visit to the Tower of London and attempted to make a guard outside the Waterloo Block laugh.
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