Recording the event with the intent of showing the video to his future child, Harry introduced his unborn baby girl to each of the guests, directly addressing the camera as it followed him around the room.
Among the slew of big name stars was his brother, Prince William (Beck Bennett) -- who was dressed like Freddie Mercury after Harry told him it was a retro costume party -- and Kate Middleton (Cecily Strong).
"Papers keep saying she's 'feuding' with your mom, but she's not," Harry said to his future child, as the Duchess of Cambridge smiled through gritted teeth.
"No, not at all! We're not feuding. Why would we be?" She said almost frantically. "Because I've followed all the strict rules and she doesn't have to, at all?!"
After that awkward exchange, Harry then ran into a man named Charles (played by Kenan Thompson), a friend of Meghan's mom, Doria Ragland.
Speaking directly to the camera, with a message for the royal baby, Charles marveled at the fact that the precious progeny will be born with both Meghan and Harry's physical characteristics.
"You might be a black ginger!" Charles exclaimed. "That's amazing! You'll be like a unicorn. Just you and Blake Griffin."
As the tour continued, Harry discovered his grandmother, Queen Elizabeth II (Kate McKinnon), struggling under a mountain of baby shower gifts, which had collapsed on top of her as she was "snooping around" to see what the Clooneys had gotten them.
Sweetly smiling for the camera, the Queen addressed her future great-granddaughter.
"Hello. Welcome to the family. I already love you with all my heart," she said, with her signature even-handed tone. "Even though you're half American, which i means you're half traitor."
Again moving the video tour on quickly, Harry tried to find Meghan somewhere in the house, but before he could, he was surprised by a very excitable James Corden (played by a bearded Aidy Bryant) who forces Harry to cut the tour short.