Below are just some of the reasons why we loved this skit.
Even though Mirren hadn't done the helium trick since she was 11 years old, she was perfectly happy to let her inner child show. With several awards under her belt, including an Academy Award for Best Actress, three Golden Globe Awards and four Emmys, it's so amazing to see just how down-to-earth the The Queen actress really is.
We were thrilled when we watched the video because Mirren has such an amazing laugh, and she genuinely seemed to be enjoying herself throughout her appearance on the The Tonight Show.
Just before Mirren puts a big red balloon to her lips, she makes a dirty little joke, "Oooh, suck in." She then laughs and apologizes, and it's hilarious.
Just watch what happens after Mirren and Fallon swap balloons, and she jokes about flatulence. Brilliant.
Now imagine Mirren doing a fake acceptance speech in a super squeaky voice, and saying, "Oh thank you, I'm so honored." LOL.
But before we ruin it all for you, watch the hilarious video below.
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