diff --git a/messaging/copr_messaging/private/hierarchy.py b/messaging/copr_messaging/private/hierarchy.py
index 80ceccda3..981fd1bfd 100644
--- a/messaging/copr_messaging/private/hierarchy.py
+++ b/messaging/copr_messaging/private/hierarchy.py
@@ -159,6 +159,19 @@ def package_full_name(self):
             release=release,
         )
 
+    @property
+    def usernames(self):
+        """
+        List of usernames that are affected by the action that caused this message.
+
+        Those users will be notified by FMN if they chose to receive their notifications.
+        """
+        usernames = [self.submitter, self.body.get("owner")]
+        # filter out nones and groups and deduplicate
+        usernames = set(u for u in usernames if isinstance(u, str) and not u.startswith("@"))
+        # return it sorted
+        return list(sorted(usernames))
+
 
 class _BuildChrootMessage(_BuildMessage):
     @property
diff --git a/messaging/copr_messaging/private/schema_old.py b/messaging/copr_messaging/private/schema_old.py
index a44ea2243..9da5181ee 100644
--- a/messaging/copr_messaging/private/schema_old.py
+++ b/messaging/copr_messaging/private/schema_old.py
@@ -128,6 +128,11 @@ def status(self):
     def package_name(self):
         return self.body.get('pkg')
 
+    @property
+    def submitter(self):
+        """The username of the person who submitted the build."""
+        return self.body.get('user')
+
     def _evr(self):
         evr = self.body.get('version')
         if not evr:
diff --git a/messaging/copr_messaging/private/schema_stomp_old.py b/messaging/copr_messaging/private/schema_stomp_old.py
index 401fb8a18..681fa7db8 100644
--- a/messaging/copr_messaging/private/schema_stomp_old.py
+++ b/messaging/copr_messaging/private/schema_stomp_old.py
@@ -139,3 +139,8 @@ def _evr(self):
     def package_name(self):
         name, _, _, _ = self._nevr()
         return name
+
+    @property
+    def submitter(self):
+        """The username of the person who submitted the build."""
+        return self.body.get('submitter')
diff --git a/messaging/copr_messaging/schema.py b/messaging/copr_messaging/schema.py
index fe16d85b4..0cc76b809 100644
--- a/messaging/copr_messaging/schema.py
+++ b/messaging/copr_messaging/schema.py
@@ -46,6 +46,14 @@ def __str__(self):
             self.status,
         )
 
+    @property
+    def agent_name(self):
+        """The username who caused the action that generated this message."""
+        if self.status == "canceled":
+            return self.submitter
+        # The other statuses are not caused by the user who started the build
+        return None
+
 
 class BuildChrootStarted(_BuildChrootMessage):
     """
@@ -58,6 +66,11 @@ def __str__(self):
             self.chroot,
         )
 
+    @property
+    def agent_name(self):
+        """The username who caused the action that generated this message."""
+        return self.submitter
+
 
 class BuildChrootStartedV1(_PreFMBuildMessage, BuildChrootStarted):
     """
diff --git a/messaging/copr_messaging/tests/test_schema.py b/messaging/copr_messaging/tests/test_schema.py
index 9d72e6fde..bc073adfb 100644
--- a/messaging/copr_messaging/tests/test_schema.py
+++ b/messaging/copr_messaging/tests/test_schema.py
@@ -108,6 +108,14 @@ def test_nevr(self):
         assert message.package_release == '1.fc31'
         assert message.package_epoch is None
 
+    def test_agent_name(self):
+        message = self.msg_class(body=self.fedmsg_message["msg"])
+        assert message.agent_name == "churchyard"
+
+    def test_usernames(self):
+        message = self.msg_class(body=self.fedmsg_message["msg"])
+        assert message.usernames == ["churchyard"]
+
 
 class BuildChrootEndedV1Test(BuildChrootStartedV1Test):
     msg_class = schema.BuildChrootEndedV1
@@ -150,6 +158,20 @@ def test_nevr(self):
         assert message.package_release == '1.fc30'
         assert message.package_epoch is None
 
+    def test_agent_name(self):
+        message = self.msg_class(body=self.fedmsg_message["msg"])
+        assert message.agent_name is None
+
+    def test_agent_name_canceled(self):
+        body = copy.deepcopy(self.fedmsg_message["msg"])
+        body["status"] = 2
+        message = self.msg_class(body=body)
+        assert message.agent_name == "kbaig"
+
+    def test_usernames(self):
+        message = self.msg_class(body=self.fedmsg_message["msg"])
+        assert message.usernames == ["kbaig"]
+
 
 class BuildChrootStartedV1DontUseTest(BuildChrootStartedV1Test):
     msg_class = schema.BuildChrootStartedV1DontUse
@@ -192,6 +214,14 @@ def test_nevr(self):
         assert message.package_release == "0"
         assert message.package_epoch == '10'
 
+    def test_agent_name(self):
+        message = self.msg_class(body=self.fedmsg_message["msg"])
+        assert message.agent_name == "praiskup"
+
+    def test_usernames(self):
+        message = self.msg_class(body=self.fedmsg_message["msg"])
+        assert message.usernames == ["praiskup"]
+
 
 class BuildChrootStompOldStartTest(unittest.TestCase):
     msg_class = schema.BuildChrootStartedV1Stomp