diff --git a/Lib/idlelib/editor.py b/Lib/idlelib/editor.py
index 3128934763a1c0..1e1e871b1bde3b 100644
--- a/Lib/idlelib/editor.py
+++ b/Lib/idlelib/editor.py
@@ -605,13 +605,16 @@ def python_docs(self, event=None):
         return "break"
 
     def cut(self,event):
+        if not self.text.tag_ranges('sel'):
+            self.text.tag_add('sel', 'insert linestart', 'insert+1l linestart')
+            self.text.mark_set('insert', 'insert linestart')
         self.text.event_generate("<<Cut>>")
         return "break"
 
     def copy(self,event):
         if not self.text.tag_ranges("sel"):
-            # There is no selection, so do nothing and maybe interrupt.
-            return None
+            self.text.tag_add('sel', 'insert linestart', 'insert+1l linestart')
+            self.text.mark_set('insert', 'insert linestart')
         self.text.event_generate("<<Copy>>")
         return "break"
 
diff --git a/Misc/NEWS.d/next/IDLE/2026-02-23-17-28-34.gh-issue-94521.vlr8XB.rst b/Misc/NEWS.d/next/IDLE/2026-02-23-17-28-34.gh-issue-94521.vlr8XB.rst
new file mode 100644
index 00000000000000..a32ab2c0526438
--- /dev/null
+++ b/Misc/NEWS.d/next/IDLE/2026-02-23-17-28-34.gh-issue-94521.vlr8XB.rst
@@ -0,0 +1 @@
+Copy or cut the current line when no text is selected in IDLE. Patch by Shixian Li.