diff --git a/src/registrar/admin.py b/src/registrar/admin.py
index 5dd0b1852..d594f013c 100644
--- a/src/registrar/admin.py
+++ b/src/registrar/admin.py
@@ -2841,6 +2841,9 @@ class PortfolioAdmin(ListHeaderAdmin):
     list_display = ("organization_name", "federal_agency", "creator")
     search_fields = ["organization_name"]
     search_help_text = "Search by organization name."
+    readonly_fields = [
+        "creator",
+    ]
 
     # Creates select2 fields (with search bars)
     autocomplete_fields = [