diff --git a/lldb/examples/python/scripted_process/scripted_process.py b/lldb/examples/python/scripted_process/scripted_process.py
--- a/lldb/examples/python/scripted_process/scripted_process.py
+++ b/lldb/examples/python/scripted_process/scripted_process.py
@@ -76,6 +76,15 @@
         """
         pass
 
+    def get_selected_thread_index(self):
+        """ Get the index of the selected scripted process thread.
+
+        Returns:
+            Int: The thread index that should be selected by lldb.
+                 (default: 0)
+        """
+        return 0
+
     @abstractmethod
     def get_registers_for_thread(self, tid):
         """ Get the register context dictionary for a certain thread of
diff --git a/lldb/include/lldb/Interpreter/ScriptedProcessInterface.h b/lldb/include/lldb/Interpreter/ScriptedProcessInterface.h
--- a/lldb/include/lldb/Interpreter/ScriptedProcessInterface.h
+++ b/lldb/include/lldb/Interpreter/ScriptedProcessInterface.h
@@ -48,6 +48,8 @@
     return nullptr;
   }
 
+  virtual uint32_t GetSelectedThreadIndex() { return LLDB_INVALID_INDEX32; }
+
   virtual StructuredData::DictionarySP GetRegistersForThread(lldb::tid_t tid) {
     return nullptr;
   }
diff --git a/lldb/source/Plugins/Process/scripted/ScriptedProcess.cpp b/lldb/source/Plugins/Process/scripted/ScriptedProcess.cpp
--- a/lldb/source/Plugins/Process/scripted/ScriptedProcess.cpp
+++ b/lldb/source/Plugins/Process/scripted/ScriptedProcess.cpp
@@ -359,6 +359,11 @@
 void ScriptedProcess::RefreshStateAfterStop() {
   // Let all threads recover from stopping and do any clean up based on the
   // previous thread state (if any).
+  const uint32_t selected_thread_idx = GetInterface().GetSelectedThreadIndex();
+
+  if (selected_thread_idx != LLDB_INVALID_INDEX32 &&
+      selected_thread_idx <= m_thread_list.GetSize())
+    m_thread_list.SetSelectedThreadByIndexID(selected_thread_idx);
 }
 
 bool ScriptedProcess::GetProcessInfo(ProcessInstanceInfo &info) {
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.h b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.h
--- a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.h
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.h
@@ -44,6 +44,8 @@
 
   StructuredData::DictionarySP GetThreadWithID(lldb::tid_t tid) override;
 
+  uint32_t GetSelectedThreadIndex() override;
+
   StructuredData::DictionarySP GetRegistersForThread(lldb::tid_t tid) override;
 
   lldb::DataExtractorSP ReadMemoryAtAddress(lldb::addr_t address, size_t size,
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.cpp b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.cpp
--- a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.cpp
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptedProcessPythonInterface.cpp
@@ -113,6 +113,21 @@
   return dict;
 }
 
+uint32_t ScriptedProcessPythonInterface::GetSelectedThreadIndex() {
+  Status error;
+  StructuredData::ObjectSP obj = Dispatch("get_selected_thread_index", error);
+
+  if (!CheckStructuredDataObject(LLVM_PRETTY_FUNCTION, obj, error))
+    return LLDB_INVALID_INDEX32;
+
+  const uint64_t val = obj->GetIntegerValue(LLDB_INVALID_INDEX32);
+
+  if (!val || std::numeric_limits<uint32_t>::max() <= val)
+    return LLDB_INVALID_INDEX32;
+
+  return static_cast<uint32_t>(val);
+}
+
 StructuredData::DictionarySP
 ScriptedProcessPythonInterface::GetRegistersForThread(lldb::tid_t tid) {
   // TODO: Implement
diff --git a/lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py b/lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py
--- a/lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py
+++ b/lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py
@@ -57,6 +57,9 @@
 
         return data
 
+    def get_selected_thread_index(self):
+        return 3
+
     def get_loaded_images(self):
         # TODO: Iterate over corefile_target modules and build a data structure
         # from it.