diff --git a/webapp/titanembeds/static/js/embed.js b/webapp/titanembeds/static/js/embed.js
index a63e164..f0fb629 100644
--- a/webapp/titanembeds/static/js/embed.js
+++ b/webapp/titanembeds/static/js/embed.js
@@ -234,6 +234,10 @@
             }
         });
         
+        if (getParameterByName("username")) {
+            $("#custom_username_field").val(getParameterByName("username"));
+        }
+        
         if (getParameterByName("forcefocus") == "1") {
             if (document.hasFocus()) {
                 primeEmbed();
diff --git a/webapp/titanembeds/templates/card_queryparams.html.j2 b/webapp/titanembeds/templates/card_queryparams.html.j2
index 7b26578..eda8ea9 100644
--- a/webapp/titanembeds/templates/card_queryparams.html.j2
+++ b/webapp/titanembeds/templates/card_queryparams.html.j2
@@ -42,6 +42,11 @@
                       <hr>
                       <em>Eg: theme=DiscordDark</em>
                     </li>
+                    <li class="collection-item">
+                      <strong>username=&lt;string&gt;</strong> <br>
+                      Prefills the guest username field with the given username. <br>
+                      <em>Eg: username=Rainbow%20Dash</em>
+                    </li>
                 </ul>
             </div>
           </div>