The 36-year-old fashion designer can't believe how fast her daughter is growing up!
Happy birthday, Maxwell!
Jessica Simpson's daughter turned five years old on Monday, and celebrated with the most epic mermaid party!
WATCH: Jessica Simpson's Daughter Maxwell Is a Little 'Cowgirl' in New Horseback Riding Pic
"My baby Maxwell is 5 years old today. She makes everyone's life mermaid magical," Simspon captioned a cute family pic -- with Maxi dressed as a mermaid -- on Instagram. "Happy Birthday to our fairytale princess. Mommy, Daddy, and Ace love you with our "holy hearts" (as Max would say) #MerMax #MAXIDREW #canyoube5forever."
The 36-year-old fashion designer later shared a photo of Maxi's "first splash."
"First Splash #MerMax5 #MAXIDREW," she wrote alongside the sweet baby picture.
Missing from Maxi's birthday festivities appears to be her "cool" cousin, Bronx.
See more in the video below.
