diff --git a/Userland/Libraries/LibJS/Bytecode/Executable.h b/Userland/Libraries/LibJS/Bytecode/Executable.h
index 01270a0f0b..6ba6a850b9 100644
--- a/Userland/Libraries/LibJS/Bytecode/Executable.h
+++ b/Userland/Libraries/LibJS/Bytecode/Executable.h
@@ -82,6 +82,9 @@ public:
 
     HashMap<size_t, SourceRecord> source_map;
 
+    Vector<DeprecatedFlyString> local_variable_names;
+    size_t local_index_base { 0 };
+
     ByteString const& get_string(StringTableIndex index) const { return string_table->get(index); }
     DeprecatedFlyString const& get_identifier(IdentifierTableIndex index) const { return identifier_table->get(index); }
 
diff --git a/Userland/Libraries/LibJS/Bytecode/Generator.cpp b/Userland/Libraries/LibJS/Bytecode/Generator.cpp
index b1a81aef2a..fa54cb6adf 100644
--- a/Userland/Libraries/LibJS/Bytecode/Generator.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/Generator.cpp
@@ -199,7 +199,7 @@ CodeGenerationErrorOr<void> Generator::emit_function_declaration_instantiation(E
     return {};
 }
 
-CodeGenerationErrorOr<NonnullGCPtr<Executable>> Generator::compile(VM& vm, ASTNode const& node, FunctionKind enclosing_function_kind, GCPtr<ECMAScriptFunctionObject const> function, MustPropagateCompletion must_propagate_completion)
+CodeGenerationErrorOr<NonnullGCPtr<Executable>> Generator::compile(VM& vm, ASTNode const& node, FunctionKind enclosing_function_kind, GCPtr<ECMAScriptFunctionObject const> function, MustPropagateCompletion must_propagate_completion, Vector<DeprecatedFlyString> local_variable_names)
 {
     Generator generator(vm, function, must_propagate_completion);
 
@@ -451,6 +451,8 @@ CodeGenerationErrorOr<NonnullGCPtr<Executable>> Generator::compile(VM& vm, ASTNo
     executable->exception_handlers = move(linked_exception_handlers);
     executable->basic_block_start_offsets = move(basic_block_start_offsets);
     executable->source_map = move(source_map);
+    executable->local_variable_names = move(local_variable_names);
+    executable->local_index_base = number_of_registers + number_of_constants;
 
     generator.m_finished = true;
 
@@ -459,12 +461,15 @@ CodeGenerationErrorOr<NonnullGCPtr<Executable>> Generator::compile(VM& vm, ASTNo
 
 CodeGenerationErrorOr<NonnullGCPtr<Executable>> Generator::generate_from_ast_node(VM& vm, ASTNode const& node, FunctionKind enclosing_function_kind)
 {
-    return compile(vm, node, enclosing_function_kind, {});
+    Vector<DeprecatedFlyString> local_variable_names;
+    if (is<ScopeNode>(node))
+        local_variable_names = static_cast<ScopeNode const&>(node).local_variables_names();
+    return compile(vm, node, enclosing_function_kind, {}, MustPropagateCompletion::Yes, move(local_variable_names));
 }
 
 CodeGenerationErrorOr<NonnullGCPtr<Executable>> Generator::generate_from_function(VM& vm, ECMAScriptFunctionObject const& function)
 {
-    return compile(vm, function.ecmascript_code(), function.kind(), &function, MustPropagateCompletion::No);
+    return compile(vm, function.ecmascript_code(), function.kind(), &function, MustPropagateCompletion::No, function.local_variables_names());
 }
 
 void Generator::grow(size_t additional_size)
diff --git a/Userland/Libraries/LibJS/Bytecode/Generator.h b/Userland/Libraries/LibJS/Bytecode/Generator.h
index 255ed214cc..139ae51791 100644
--- a/Userland/Libraries/LibJS/Bytecode/Generator.h
+++ b/Userland/Libraries/LibJS/Bytecode/Generator.h
@@ -343,7 +343,7 @@ public:
 private:
     VM& m_vm;
 
-    static CodeGenerationErrorOr<NonnullGCPtr<Executable>> compile(VM&, ASTNode const&, FunctionKind, GCPtr<ECMAScriptFunctionObject const>, MustPropagateCompletion = MustPropagateCompletion::Yes);
+    static CodeGenerationErrorOr<NonnullGCPtr<Executable>> compile(VM&, ASTNode const&, FunctionKind, GCPtr<ECMAScriptFunctionObject const>, MustPropagateCompletion, Vector<DeprecatedFlyString> local_variable_names);
 
     enum class JumpType {
         Continue,
diff --git a/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp b/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
index deb01be7c7..16a1eb3131 100644
--- a/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
@@ -53,8 +53,7 @@ static ByteString format_operand(StringView name, Operand operand, Bytecode::Exe
         }
         break;
     case Operand::Type::Local:
-        // FIXME: Show local name.
-        builder.appendff("\033[34mloc{}\033[0m", operand.index());
+        builder.appendff("\033[34m{}~{}\033[0m", executable.local_variable_names[operand.index() - executable.local_index_base], operand.index() - executable.local_index_base);
         break;
     case Operand::Type::Constant: {
         builder.append("\033[36m"sv);
@@ -708,9 +707,9 @@ Interpreter::ResultAndReturnRegister Interpreter::run_executable(Executable& exe
     VERIFY(!vm().execution_context_stack().is_empty());
 
     auto& running_execution_context = vm().running_execution_context();
-    u32 registers_and_contants_count = executable.number_of_registers + executable.constants.size();
-    if (running_execution_context.registers_and_constants_and_locals.size() < registers_and_contants_count)
-        running_execution_context.registers_and_constants_and_locals.resize(registers_and_contants_count);
+    u32 registers_and_constants_and_locals_count = executable.number_of_registers + executable.constants.size() + executable.local_variable_names.size();
+    if (running_execution_context.registers_and_constants_and_locals.size() < registers_and_constants_and_locals_count)
+        running_execution_context.registers_and_constants_and_locals.resize(registers_and_constants_and_locals_count);
 
     TemporaryChange restore_running_execution_context { m_running_execution_context, &running_execution_context };
     TemporaryChange restore_arguments { m_arguments, running_execution_context.arguments.span() };