Let's make this birthday one to remember.

28 years old (Born on April 21, 1997)

Happy Birthday, Sydney! You're officially one of the "Cool Kids"—though let's be honest, you've always been ahead of that curve. From rocking stages worldwide with your brothers Jamie, Noah, and Graham to being named MTV's Artist to Watch (they clearly have great taste), you've made alt-pop history look effortless.

Here's wishing you another year filled with catchy choruses, unforgettable performances, and endless sibling harmony—both musically and otherwise. May your birthday be as timelessly cool as your music continues to be. Keep shining bright; after all, you're not just an Echosmith star—you're everyone's favorite indie-pop queen!