The Reel also included a glimpse of Lilibet's Little Mermaid cake covered in pastel ... Daddy's little girl and favorite adventurer. Happy birthday Lili!' Meghan captioned her post.

But instead of forking out for a professional to make a cake for her little girl, she decided to give it a go herself. She took to TikTok to share a look at the process, beginning with a mermaid ...

One image showed Lilibet's two-tier birthday cake, decorated with an Ariel theme from The Little Mermaid. In another ... "Daddy's little girl and favourite adventurer. Happy birthday Lili!" ...