diff --git a/Lib/tkinter/font.py b/Lib/tkinter/font.py
index e74049c8aa3..136425726ab 100644
--- a/Lib/tkinter/font.py
+++ b/Lib/tkinter/font.py
@@ -151,7 +151,7 @@ def measure(self, text, displayof=None):
         args = (text,)
         if displayof:
             args = ('-displayof', displayof, text)
-        return self._root.tk.getint(self._call("font", "measure", self.name, *args))
+        return self._tk.getint(self._call("font", "measure", self.name, *args))
 
     def metrics(self, *options, **kw):
         """Return font metrics.
@@ -164,13 +164,13 @@ def metrics(self, *options, **kw):
             args = ('-displayof', displayof)
         if options:
             args = args + self._get(options)
-            return self._root.tk.getint(
+            return self._tk.getint(
                 self._call("font", "metrics", self.name, *args))
         else:
             res = self._split(self._call("font", "metrics", self.name, *args))
             options = {}
             for i in range(0, len(res), 2):
-                options[res[i][1:]] = self._root.tk.getint(res[i+1])
+                options[res[i][1:]] = self._tk.getint(res[i+1])
             return options
 
 
diff --git a/Misc/NEWS b/Misc/NEWS
index a133e3c46bd..d29022a6616 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -27,6 +27,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #24408: Fixed AttributeError in measure() and metrics() methods of
+  tkinter.Font.
+
 - Issue #14373: C implementation of functools.lru_cache() now can be used with
   methods.