diff --git a/gtk2_ardour/luainstance.cc b/gtk2_ardour/luainstance.cc
index c813eeea63..0f02f943ea 100644
--- a/gtk2_ardour/luainstance.cc
+++ b/gtk2_ardour/luainstance.cc
@@ -37,6 +37,7 @@
 #include "luainstance.h"
 #include "luasignal.h"
 #include "marker.h"
+#include "processor_box.h"
 #include "time_axis_view.h"
 #include "selection.h"
 #include "script_selector.h"
@@ -349,6 +350,16 @@ const char *luasignalstr[] = {
 }; // namespace
 
 
+/** special cases for Ardour's Mixer UI */
+namespace LuaMixer {
+
+	ProcessorBox::ProcSelection
+	processor_selection (lua_State* L) {
+		return ProcessorBox::current_processor_selection ();
+	}
+
+};
+
 ////////////////////////////////////////////////////////////////////////////////
 
 #define xstr(s) stringify(s)
@@ -545,6 +556,8 @@ LuaInstance::register_classes (lua_State* L)
 
 		.addFunction ("http_get", (std::string (*)(const std::string&))&ArdourCurl::http_get)
 
+		.addFunction ("processor_selection", &LuaMixer::processor_selection)
+
 		.beginStdList <ArdourMarker*> ("ArdourMarkerList")
 		.endClass ()
 
diff --git a/gtk2_ardour/processor_box.h b/gtk2_ardour/processor_box.h
index 5dd7483be4..5f0115529c 100644
--- a/gtk2_ardour/processor_box.h
+++ b/gtk2_ardour/processor_box.h
@@ -454,6 +454,16 @@ class ProcessorBox : public Gtk::HBox, public PluginInterestedObject, public ARD
 	static Gtkmm2ext::Bindings* bindings;
 	static void register_actions();
 
+	typedef std::vector<boost::shared_ptr<ARDOUR::Processor> > ProcSelection;
+
+	static ProcSelection current_processor_selection () {
+		ProcSelection ps;
+		if (_current_processor_box) {
+			_current_processor_box->get_selected_processors (ps);
+		}
+		return ps;
+	}
+
 #ifndef NDEBUG
 	static bool show_all_processors;
 #endif
@@ -535,8 +545,6 @@ class ProcessorBox : public Gtk::HBox, public PluginInterestedObject, public ARD
 
 	void ab_plugins ();
 
-	typedef std::vector<boost::shared_ptr<ARDOUR::Processor> > ProcSelection;
-
 	void cut_processors (const ProcSelection&);
 	void copy_processors (const ProcSelection&);
 	void delete_processors (const ProcSelection&);