diff --git a/toonz/sources/toonz/cellselection.cpp b/toonz/sources/toonz/cellselection.cpp
index 4fc08e2..15a0e5d 100644
--- a/toonz/sources/toonz/cellselection.cpp
+++ b/toonz/sources/toonz/cellselection.cpp
@@ -1253,6 +1253,62 @@ public:
   //-----------------------------------------------------------------------------
 };
 
+//=============================================================================
+// Duplicate in XSheet Undo
+//-----------------------------------------------------------------------------
+
+class DuplicateInXSheetUndo final : public TUndo {
+  int m_r0, m_r1, m_c;
+  TXshCell m_oldCell;
+  TXshCell m_newCell;
+  bool m_goForward;
+
+public:
+  DuplicateInXSheetUndo(int r0, int r1, int c, TXshCell oldCell,
+                        TXshCell newCell, bool goForward)
+      : m_r0(r0)
+      , m_r1(r1)
+      , m_c(c)
+      , m_oldCell(oldCell)
+      , m_newCell(newCell)
+      , m_goForward(goForward) {}
+
+  ~DuplicateInXSheetUndo() {}
+
+  void undo() const override {
+    TXsheet *xsh = TApp::instance()->getCurrentXsheet()->getXsheet();
+    if (m_r1 > m_r0) {
+      for (int i = m_r0; i <= m_r1; i++) {
+        xsh->setCell(i, m_c, m_oldCell);
+      }
+    } else
+      xsh->setCell(m_r0, m_c, m_oldCell);
+    TApp::instance()->getCurrentXsheet()->notifyXsheetChanged();
+    if (m_goForward) CommandManager::instance()->execute(MI_PrevFrame);
+  }
+
+  void redo() const override {
+    TXsheet *xsh = TApp::instance()->getCurrentXsheet()->getXsheet();
+    if (m_r1 > m_r0) {
+      for (int i = m_r0; i <= m_r1; i++) {
+        xsh->setCell(i, m_c, m_newCell);
+      }
+    } else
+      xsh->setCell(m_r0, m_c, m_newCell);
+    TApp::instance()->getCurrentXsheet()->notifyXsheetChanged();
+    if (m_goForward) CommandManager::instance()->execute(MI_NextFrame);
+  }
+
+  int getSize() const override { return sizeof(*this); }
+
+  QString getHistoryString() override {
+    return QObject::tr("Duplicate Frame in XSheet");
+  }
+
+  int getHistoryType() override { return HistoryType::Xsheet; }
+  //-----------------------------------------------------------------------------
+};
+
 }  // namespace
 //-----------------------------------------------------------------------------
 
@@ -1337,6 +1393,7 @@ void TCellSelection::enableCommands() {
                 &TCellSelection::reframeWithEmptyInbetweens);
 
   enableCommand(this, MI_PasteNumbers, &TCellSelection::overwritePasteNumbers);
+  enableCommand(this, MI_Duplicate, &TCellSelection::duplicateFrame);
 }
 //-----------------------------------------------------------------------------
 // Used in RenameCellField::eventFilter()
@@ -1853,6 +1910,96 @@ void TCellSelection::pasteKeyframesInto() {
 
 //-----------------------------------------------------------------------------
 
+void TCellSelection::duplicateFrame() {
+  if (!Preferences::instance()->isSyncLevelRenumberWithXsheetEnabled()) return;
+
+  TXsheet *xsh = TApp::instance()->getCurrentXsheet()->getXsheet();
+  // TApp::instance()->getCurrentScene()->getScene()->g
+  int r0, c0, r1, c1;
+  getSelectedCells(r0, c0, r1, c1);
+  // check for cases that won't work
+  if (c1 > c0) {
+    DVGui::error("Please select only one layer to duplicate a frame.");
+    return;
+  }
+  if (r1 > r0) {
+    DVGui::error("Please select only one frame to duplicate.");
+    return;
+  }
+
+  r0 = TTool::getApplication()->getCurrentFrame()->getFrame();
+  c0 = TTool::getApplication()->getCurrentColumn()->getColumnIndex();
+
+  TXshCell cell            = xsh->getCell(r0, c0);
+  TXshCell prevCell        = xsh->getCell(r0 - 1, c0);
+  TXshCell nextCell        = xsh->getCell(r0 + 1, c0);
+  TFrameId selectedFrameId = cell.getFrameId();
+  TXshSimpleLevel *sl      = cell.getSimpleLevel();
+  bool usePreviousCell     = false;
+  bool goForward           = false;
+
+  // check if we use the current cell to duplicate or the previous cell
+  if (cell.isEmpty()) {
+    if (prevCell.isEmpty() || !(prevCell.m_level->getSimpleLevel())) {
+      return;
+    }
+    usePreviousCell = true;
+    selectedFrameId = prevCell.getFrameId();
+    sl              = prevCell.getSimpleLevel();
+  }
+  if (!sl || sl->isSubsequence() || sl->isReadOnly()) return;
+
+  // check whether to change the next cell or replace the current cell if it is
+  // a hold from a previous frame
+  if (!usePreviousCell) {
+    // use the current cell
+    if (prevCell.m_level == cell.m_level &&
+        prevCell.m_frameId == cell.m_frameId) {
+      // the current frame is a hold from a previous frame
+      // change this frame and any sequential frames part of the same hold
+      bool hold = true;
+      r1        = r0 + 1;
+      while (hold) {
+        TXshCell testCell = xsh->getCell(r1, c0);
+        if (testCell.m_frameId == cell.m_frameId &&
+            testCell.m_level == cell.m_level) {
+          r1 += 1;
+        } else {
+          r1 -= 1;
+          hold = false;
+        }
+      }
+
+    } else {
+      //  This is not part of a hold, use the next cell.
+      // make sure we are not going to overwrite a non-empty cell
+      if (nextCell.isEmpty()) {
+        r0 += 1;
+        cell      = nextCell;
+        goForward = true;
+      } else
+        return;
+    }
+  } else {
+    // cell = prevCell;
+  }
+
+  std::set<TFrameId> frames;
+  frames.insert(selectedFrameId);
+  TUndoManager::manager()->beginBlock();
+  FilmstripCmd::duplicate(sl, frames, true);
+  TXshCell newCell;
+  newCell.m_level   = sl;
+  newCell.m_frameId = selectedFrameId + 1;
+  DuplicateInXSheetUndo *undo =
+      new DuplicateInXSheetUndo(r0, r1, c0, cell, newCell, goForward);
+  TUndoManager::manager()->add(undo);
+  TUndoManager::manager()->endBlock();
+  undo->redo();
+}
+
+//-----------------------------------------------------------------------------
+
 void TCellSelection::openTimeStretchPopup() {
   if (!m_timeStretchPopup) m_timeStretchPopup = new TimeStretchPopup();
   m_timeStretchPopup->show();
diff --git a/toonz/sources/toonz/cellselection.h b/toonz/sources/toonz/cellselection.h
index 6adf8d2..fcc03e0 100644
--- a/toonz/sources/toonz/cellselection.h
+++ b/toonz/sources/toonz/cellselection.h
@@ -109,6 +109,7 @@ public:
   void convertVectortoVector();
 
   void reframeWithEmptyInbetweens();
+  void duplicateFrame();
 
   void renameCells(TXshCell &cell);
   // rename cells for each columns with correspondent item in the list
diff --git a/toonz/sources/toonz/xshcellviewer.cpp b/toonz/sources/toonz/xshcellviewer.cpp
index 107f177..4f678d8 100644
--- a/toonz/sources/toonz/xshcellviewer.cpp
+++ b/toonz/sources/toonz/xshcellviewer.cpp
@@ -3266,6 +3266,7 @@ void CellArea::createCellMenu(QMenu &menu, bool isCellSelected, TXshCell cell) {
 
     menu.addAction(cmdManager->getAction(MI_Clear));
     menu.addAction(cmdManager->getAction(MI_Insert));
+    menu.addAction(cmdManager->getAction(MI_Duplicate));
     menu.addSeparator();
 
     TXshSimpleLevel *sl = TApp::instance()->getCurrentLevel()->getSimpleLevel();