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 ...