diff --git a/src/registrar/admin.py b/src/registrar/admin.py
index 88c064379..fba675bf7 100644
--- a/src/registrar/admin.py
+++ b/src/registrar/admin.py
@@ -2736,8 +2736,30 @@ class DomainRequestAdmin(ListHeaderAdmin, ImportExportModelAdmin):
         return response
 
     def change_view(self, request, object_id, form_url="", extra_context=None):
-        """Display restricted warning,
-        Setup the auditlog trail and pass it in extra context."""
+        """Display restricted warning, setup the auditlog trail and pass it in extra context,
+        display warning that status cannot be changed from 'Approved' if domain is in Ready state"""
+
+        # Fetch the domain request instance
+        domain_request: models.DomainRequest = models.DomainRequest.objects.get(pk=object_id)
+        if domain_request.approved_domain and domain_request.approved_domain.state == models.Domain.State.READY:
+            domain = domain_request.approved_domain
+            # get change url for domain
+            app_label = domain_request.approved_domain._meta.app_label
+            model_name = domain._meta.model_name
+            obj_id = domain.id
+            change_url = reverse("admin:%s_%s_change" % (app_label, model_name), args=[obj_id])
+
+            message = format_html(
+                "The status of this domain request cannot be changed because it has been joined to a domain in Ready status: "  # noqa: E501
+                "<a href='{}'>{}</a>",
+                mark_safe(change_url),  # nosec
+                escape(str(domain)),
+            )
+            messages.warning(
+                request,
+                message,
+            )
+
         obj = self.get_object(request, object_id)
         self.display_restricted_warning(request, obj)
 
diff --git a/src/registrar/tests/test_admin_request.py b/src/registrar/tests/test_admin_request.py
index efb1331df..da789a1b5 100644
--- a/src/registrar/tests/test_admin_request.py
+++ b/src/registrar/tests/test_admin_request.py
@@ -28,6 +28,8 @@ from registrar.models import (
     AllowedEmail,
     Suborganization,
 )
+from registrar.models.host import Host
+from registrar.models.public_contact import PublicContact
 from .common import (
     MockSESClient,
     completed_domain_request,
@@ -39,7 +41,7 @@ from .common import (
     MockEppLib,
     GenericTestHelper,
 )
-from unittest.mock import patch
+from unittest.mock import ANY, patch
 
 from django.conf import settings
 import boto3_mocking  # type: ignore
@@ -79,6 +81,8 @@ class TestDomainRequestAdmin(MockEppLib):
 
     def tearDown(self):
         super().tearDown()
+        Host.objects.all().delete()
+        PublicContact.objects.all().delete()
         Domain.objects.all().delete()
         DomainInformation.objects.all().delete()
         DomainRequest.objects.all().delete()
@@ -1889,6 +1893,37 @@ class TestDomainRequestAdmin(MockEppLib):
                     "Cannot edit a domain request with a restricted creator.",
                 )
 
+    @less_console_noise_decorator
+    def test_approved_domain_request_with_ready_domain_has_warning_message(self):
+        """Tests if the domain request has a warning message when the approved domain is in Ready state"""
+        # Create an instance of the model
+        domain_request = completed_domain_request(status=DomainRequest.DomainRequestStatus.IN_REVIEW)
+        # Approve the domain request
+        domain_request.approve()
+        domain_request.save()
+
+        # Add nameservers to get to Ready state
+        domain_request.approved_domain.nameservers = [
+            ("ns1.city.gov", ["1.1.1.1"]),
+            ("ns2.city.gov", ["1.1.1.2"]),
+        ]
+        domain_request.approved_domain.save()
+
+        with boto3_mocking.clients.handler_for("sesv2", self.mock_client):
+            with patch("django.contrib.messages.warning") as mock_warning:
+                # Create a request object
+                self.client.force_login(self.superuser)
+                self.client.get(
+                    "/admin/registrar/domainrequest/{}/change/".format(domain_request.pk),
+                    follow=True,
+                )
+
+                # Assert that the error message was called with the correct argument
+                mock_warning.assert_called_once_with(
+                    ANY,  # don't care about the request argument
+                    f"The status of this domain request cannot be changed because it has been joined to a domain in Ready status: <a href='/admin/registrar/domain/{domain_request.approved_domain.id}/change/'>{domain_request.approved_domain.name}</a>",  # noqa
+                )
+
     def trigger_saving_approved_to_another_state(self, domain_is_active, another_state, rejection_reason=None):
         """Helper method that triggers domain request state changes from approved to another state,
         with an associated domain that can be either active (READY) or not.