diff --git a/app/filters.php b/app/filters.php
index 57a6726fb9..6cf6de8377 100644
--- a/app/filters.php
+++ b/app/filters.php
@@ -13,6 +13,11 @@
         }
     }
 
+    /** Add a global class to everything.
+     *  We want it to come first, so stuff its filter does can be overridden.
+     */
+    array_unshift($classes, 'app');
+
     /** Add class if sidebar is active */
     if (display_sidebar()) {
         $classes[] = 'sidebar-primary';
@@ -68,3 +73,23 @@
     );
     return template_path(locate_template(["views/{$comments_template}", $comments_template]) ?: $comments_template);
 }, 100);
+
+/**
+ * Render WordPress searchform using Blade
+ */
+add_filter('get_search_form', function () {
+    return template('partials.searchform');
+});
+
+/**
+ * Collect data for searchform.
+ */
+add_filter('sage/template/app/data', function ($data) {
+    return $data + [
+        'sf_action' => esc_url(home_url('/')),
+        'sf_screen_reader_text' => _x('Search for:', 'label', 'sage'),
+        'sf_placeholder' => esc_attr_x('Search …', 'placeholder', 'sage'),
+        'sf_current_query' => get_search_query(),
+        'sf_submit_text' => esc_attr_x('Search', 'submit button', 'sage'),
+    ];
+});
diff --git a/resources/views/partials/searchform.blade.php b/resources/views/partials/searchform.blade.php
new file mode 100644
index 0000000000..d4b5847184
--- /dev/null
+++ b/resources/views/partials/searchform.blade.php
@@ -0,0 +1,7 @@
+<form role="search" method="get" class="search-form" action="{{ $sf_action }}">
+  <label>
+    <span class="screen-reader-text">{{ $sf_screen_reader_text }}</span>
+    <input type="search" class="search-field" placeholder="{!! $sf_placeholder !!}" value="{{ $sf_current_query }}" name="s">
+  </label>
+  <input type="submit" class="search-submit" value="{{ $sf_submit_text }}">
+</form>