diff --git a/Libraries/LibWeb/URLPattern/URLPattern.cpp b/Libraries/LibWeb/URLPattern/URLPattern.cpp
index 9e8cd4b7a22..bafd9c8efb1 100644
--- a/Libraries/LibWeb/URLPattern/URLPattern.cpp
+++ b/Libraries/LibWeb/URLPattern/URLPattern.cpp
@@ -13,8 +13,9 @@ namespace Web::URLPattern {
 
 GC_DEFINE_ALLOCATOR(URLPattern);
 
-URLPattern::URLPattern(JS::Realm& realm)
+URLPattern::URLPattern(JS::Realm& realm, URL::Pattern::Pattern pattern)
     : PlatformObject(realm)
+    , m_url_pattern(move(pattern))
 {
 }
 
@@ -26,14 +27,28 @@ void URLPattern::initialize(JS::Realm& realm)
     WEB_SET_PROTOTYPE_FOR_INTERFACE(URLPattern);
 }
 
-WebIDL::ExceptionOr<GC::Ref<URLPattern>> URLPattern::construct_impl(JS::Realm& realm, URLPatternInput const&, String const&, URLPatternOptions const&)
+// https://urlpattern.spec.whatwg.org/#dom-urlpattern-urlpattern
+WebIDL::ExceptionOr<GC::Ref<URLPattern>> URLPattern::construct_impl(JS::Realm& realm, URLPatternInput const& input, String const& base_url, URLPatternOptions const& options)
 {
-    return realm.create<URLPattern>(realm);
+    // 1. Run initialize given this, input, baseURL, and options.
+    return create(realm, input, base_url, options);
 }
 
-WebIDL::ExceptionOr<GC::Ref<URLPattern>> URLPattern::construct_impl(JS::Realm& realm, URLPatternInput const&, URLPatternOptions const&)
+// https://urlpattern.spec.whatwg.org/#dom-urlpattern-urlpattern-input-options
+WebIDL::ExceptionOr<GC::Ref<URLPattern>> URLPattern::construct_impl(JS::Realm& realm, URLPatternInput const& input, URLPatternOptions const& options)
 {
-    return realm.create<URLPattern>(realm);
+    // 1. Run initialize given this, input, null, and options.
+    return create(realm, input, {}, options);
+}
+
+// https://urlpattern.spec.whatwg.org/#urlpattern-initialize
+WebIDL::ExceptionOr<GC::Ref<URLPattern>> URLPattern::create(JS::Realm& realm, URLPatternInput const& input, Optional<String> const& base_url, URLPatternOptions const& options)
+{
+    // 1. Set this’s associated URL pattern to the result of create given input, baseURL, and options.
+    auto pattern_or_error = URL::Pattern::Pattern::create(input, base_url, options);
+    if (pattern_or_error.is_error())
+        return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, pattern_or_error.error().message };
+    return realm.create<URLPattern>(realm, pattern_or_error.release_value());
 }
 
 // https://urlpattern.spec.whatwg.org/#dom-urlpattern-exec
diff --git a/Libraries/LibWeb/URLPattern/URLPattern.h b/Libraries/LibWeb/URLPattern/URLPattern.h
index d039d32da19..27e6be7d9ab 100644
--- a/Libraries/LibWeb/URLPattern/URLPattern.h
+++ b/Libraries/LibWeb/URLPattern/URLPattern.h
@@ -24,6 +24,7 @@ class URLPattern : public Bindings::PlatformObject {
     GC_DECLARE_ALLOCATOR(URLPattern);
 
 public:
+    static WebIDL::ExceptionOr<GC::Ref<URLPattern>> create(JS::Realm&, URLPatternInput const&, Optional<String> const& base_url, URLPatternOptions const& = {});
     static WebIDL::ExceptionOr<GC::Ref<URLPattern>> construct_impl(JS::Realm&, URLPatternInput const&, String const& base_url, URLPatternOptions const& = {});
     static WebIDL::ExceptionOr<GC::Ref<URLPattern>> construct_impl(JS::Realm&, URLPatternInput const&, URLPatternOptions const& = {});
 
@@ -45,7 +46,7 @@ public:
 protected:
     virtual void initialize(JS::Realm&) override;
 
-    explicit URLPattern(JS::Realm&);
+    explicit URLPattern(JS::Realm&, URL::Pattern::Pattern);
 
 private:
     // https://urlpattern.spec.whatwg.org/#ref-for-url-pattern%E2%91%A0