diff --git a/lldb/source/Core/ValueObjectDynamicValue.cpp b/lldb/source/Core/ValueObjectDynamicValue.cpp
--- a/lldb/source/Core/ValueObjectDynamicValue.cpp
+++ b/lldb/source/Core/ValueObjectDynamicValue.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "lldb/Core/ValueObjectDynamicValue.h"
+#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h"
 #include "lldb/Core/Value.h"
 #include "lldb/Core/ValueObject.h"
 #include "lldb/Symbol/CompilerType.h"
@@ -108,6 +109,22 @@
   return m_parent->GetValueType();
 }
 
+static bool UseSwiftRuntime(ValueObject &valobj,
+                            const ExecutionContext &exe_ctx) {
+  if (auto *frame = exe_ctx.GetFramePtr())
+    if (frame->GetLanguage() == lldb::eLanguageTypeSwift)
+      return true;
+
+  if (auto *process = exe_ctx.GetProcessPtr())
+    if (auto *runtime = llvm::dyn_cast_or_null<ObjCLanguageRuntime>(
+            process->GetLanguageRuntime(lldb::eLanguageTypeObjC)))
+      if (auto class_sp = runtime->GetClassDescriptor(valobj))
+        if (class_sp->IsSwift())
+          return true;
+
+  return false;
+}
+
 bool ValueObjectDynamicValue::UpdateValue() {
   SetValueIsValid(false);
   m_error.Clear();
@@ -146,6 +163,17 @@
   LanguageRuntime *runtime = nullptr;
 
   lldb::LanguageType known_type = m_parent->GetObjectRuntimeLanguage();
+
+  // An ObjC object in a Swift context, or a ObjC object implemented in Swift.
+  if (known_type == lldb::eLanguageTypeObjC &&
+      UseSwiftRuntime(*m_parent, exe_ctx)) {
+    runtime = process->GetLanguageRuntime(lldb::eLanguageTypeSwift);
+    if (runtime)
+      found_dynamic_type = runtime->GetDynamicTypeAndAddress(
+          *m_parent, m_use_dynamic, class_type_or_name, dynamic_address,
+          value_type);
+  }
+
   if (known_type != lldb::eLanguageTypeUnknown &&
       known_type != lldb::eLanguageTypeC) {
     runtime = process->GetLanguageRuntime(known_type);
diff --git a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.h b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.h
--- a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.h
+++ b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.h
@@ -34,6 +34,8 @@
     return true; // any Objective-C v2 runtime class descriptor we vend is valid
   }
 
+  bool IsSwift() const override;
+
   // a custom descriptor is used for tagged pointers
   bool GetTaggedPointerInfo(uint64_t *info_bits = nullptr,
                             uint64_t *value_bits = nullptr,
diff --git a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.cpp b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.cpp
--- a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.cpp
+++ b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.cpp
@@ -530,6 +530,18 @@
   return 0;
 }
 
+// From the ObjC runtime.
+static uint8_t IS_SWIFT_STABLE = 1U << 1;
+
+bool ClassDescriptorV2::IsSwift() const {
+  std::unique_ptr<objc_class_t> objc_class;
+  if (auto *process = m_runtime.GetProcess())
+    if (Read_objc_class(process, objc_class))
+      return objc_class->m_flags & IS_SWIFT_STABLE;
+
+  return false;
+}
+
 ClassDescriptorV2::iVarsStorage::iVarsStorage() : m_ivars(), m_mutex() {}
 
 size_t ClassDescriptorV2::iVarsStorage::size() { return m_ivars.size(); }
diff --git a/lldb/source/Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h b/lldb/source/Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h
--- a/lldb/source/Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h
+++ b/lldb/source/Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h
@@ -86,6 +86,8 @@
       return (m_is_cf == eLazyBoolYes);
     }
 
+    virtual bool IsSwift() const { return false; }
+
     virtual bool IsValid() = 0;
 
     /// There are two routines in the ObjC runtime that tagged pointer clients