diff --git a/Tests/LibWeb/Text/expected/HTML/StructuredClone-object-primitives.txt b/Tests/LibWeb/Text/expected/HTML/StructuredClone-object-primitives.txt
index d3eebbfa88..3955abadde 100644
--- a/Tests/LibWeb/Text/expected/HTML/StructuredClone-object-primitives.txt
+++ b/Tests/LibWeb/Text/expected/HTML/StructuredClone-object-primitives.txt
@@ -5,4 +5,5 @@ false
 This is a String object
 9007199254740991
 1692748800000
+/abc/gimsuy
 ERROR: DataCloneError: Cannot serialize Symbol
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/input/HTML/StructuredClone-object-primitives.html b/Tests/LibWeb/Text/input/HTML/StructuredClone-object-primitives.html
index 512ef6c7e5..0ba2a843e5 100644
--- a/Tests/LibWeb/Text/input/HTML/StructuredClone-object-primitives.html
+++ b/Tests/LibWeb/Text/input/HTML/StructuredClone-object-primitives.html
@@ -8,6 +8,7 @@
         println(structuredClone(new String("This is a String object")));
         println(structuredClone(BigInt("0x1fffffffffffff")));
         println(structuredClone(Date.UTC(2023, 7, 23)));
+        println(structuredClone(/abc/gimsuy));
 
         try {
             structuredClone(Symbol("foo"));
diff --git a/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp b/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
index 61f3ece718..96bb3b60e0 100644
--- a/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
+++ b/Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
@@ -16,6 +16,7 @@
 #include <LibJS/Runtime/Date.h>
 #include <LibJS/Runtime/NumberObject.h>
 #include <LibJS/Runtime/PrimitiveString.h>
+#include <LibJS/Runtime/RegExpObject.h>
 #include <LibJS/Runtime/StringObject.h>
 #include <LibJS/Runtime/VM.h>
 #include <LibWeb/Bindings/ExceptionOrUtils.h>
@@ -67,6 +68,8 @@ enum ValueTag {
 
     DateObject,
 
+    RegExpObject,
+
     // TODO: Define many more types
 
     // This tag or higher are understood to be errors
@@ -171,7 +174,20 @@ public:
             m_serialized.append(bit_cast<u32*>(&date_value), 2);
         }
 
-        // 12 - 24: FIXME: Serialize other data types
+        // 12. Otherwise, if value has a [[RegExpMatcher]] internal slot, then set serialized to
+        //     { [[Type]]: "RegExp", [[RegExpMatcher]]: value.[[RegExpMatcher]], [[OriginalSource]]: value.[[OriginalSource]],
+        //       [[OriginalFlags]]: value.[[OriginalFlags]] }.
+        else if (value.is_object() && is<JS::RegExpObject>(value.as_object())) {
+            m_serialized.append(ValueTag::RegExpObject);
+            auto& regexp_object = static_cast<JS::RegExpObject&>(value.as_object());
+            // Note: A Regex<ECMA262> object is perfectly happy to be reconstructed with just the source+flags
+            //       In the future, we could optimize the work being done on the deserialize step by serializing
+            //       more of the internal state (the [[RegExpMatcher]] internal slot)
+            TRY(serialize_string(m_serialized, TRY_OR_THROW_OOM(m_vm, String::from_deprecated_string(regexp_object.pattern()))));
+            TRY(serialize_string(m_serialized, TRY_OR_THROW_OOM(m_vm, String::from_deprecated_string(regexp_object.flags()))));
+        }
+
+        // 13 - 24: FIXME: Serialize other data types
         else {
             return throw_completion(WebIDL::DataCloneError::create(*m_vm.current_realm(), "Unsupported type"_fly_string));
         }
@@ -301,6 +317,12 @@ public:
                 m_memory.append(JS::Date::create(*realm, value));
                 break;
             }
+            case ValueTag::RegExpObject: {
+                auto pattern = TRY(deserialize_string_primitive(m_vm, m_vector, position));
+                auto flags = TRY(deserialize_string_primitive(m_vm, m_vector, position));
+                m_memory.append(TRY(JS::regexp_create(m_vm, move(pattern), move(flags))));
+                break;
+            }
             default:
                 m_error = "Unsupported type"_fly_string;
                 break;