diff --git a/pytition/petition/tests/tests_PetitionViews.py b/pytition/petition/tests/tests_PetitionViews.py
index 2a0eb522..0a18b10b 100644
--- a/pytition/petition/tests/tests_PetitionViews.py
+++ b/pytition/petition/tests/tests_PetitionViews.py
@@ -36,6 +36,19 @@ def test_petition_detail(self):
         self.assertContains(response, text='<meta property="og:url" content="http://testserver/petition/{}/" />'
                             .format(petition.id))
 
+    def test_fill_petition_when_logged(self):
+        """ if logged in, the petition form should be pre filled with user account info """
+        petition = Petition.objects.filter(user__user__username="julia").first()
+        self.login('john')
+        response = self.client.get(reverse("detail", args=[petition.id]))
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.context['petition'], petition)
+        self.assertTemplateUsed(response, "petition/petition_detail.html")
+
+        form = response.context['form']
+        self.assertEqual(form.is_bound, True)
+        self.assertContains(response, text='value="John"')
+
     def test_petition_success_msg(self):
         """ Test that the success modal is there when signing and confirming """
         petition = Petition.objects.filter(published=True).first()
@@ -228,4 +241,4 @@ def test_petition_unpublish_org(self):
         response = self.client.get(reverse("petition_unpublish", args=[petition.id]))
         petition.refresh_from_db()
         self.assertEqual(response.status_code, 403)
-        self.assertEqual(petition.published, True)
\ No newline at end of file
+        self.assertEqual(petition.published, True)
diff --git a/pytition/petition/views.py b/pytition/petition/views.py
index 4cbfa742..fd6a990c 100644
--- a/pytition/petition/views.py
+++ b/pytition/petition/views.py
@@ -1594,8 +1594,15 @@ def slug_show_petition(request, orgslugname=None, username=None, petitionname=No
         except SlugModel.DoesNotExist:
             raise Http404(_("Sorry, we are not able to find this petition"))
         petition = slug.petition
+
+    initial = None if not pytitionuser else {
+        'first_name': pytitionuser.user.first_name,
+        'last_name': pytitionuser.user.last_name,
+        'email': pytitionuser.user.email
+    }
+
     check_petition_is_accessible(request, petition)
-    sign_form = SignatureForm(petition=petition)
+    sign_form = SignatureForm(petition=petition, initial=initial)
 
     reasons = ModerationReason.objects.all()
     ctx = {"user": pytitionuser, "petition": petition, "form": sign_form,