Javascript code to produce random tags on button clicking not working

I want generate one tags when click the button, but unfortunately the tag only displays after the page load, but not when I click the button. can anyone help me?

const tags = ['#tiktok', '#twitter', '#facebook', '#instagram', '#hot', '#youtube'];

let btn = document.getElementById("btn");
btn.addEventListener("click", myFunction(tags));

function myFunction(array) {
  var out = [];
  var out = array[Math.floor(Math.random() * array.length)];
  alert(out);
}

<div class="card-header bg-danger text-white">
  <strong>tags</strong>
  <button id="btn" class="btn-primary">Generate</button>
</div>