diff --git a/stdplugins/who.py b/stdplugins/who.py
new file mode 100644
index 0000000..0e1ebc3
--- /dev/null
+++ b/stdplugins/who.py
@@ -0,0 +1,31 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from telethon import events
+from telethon.tl import types
+
+
+@borg.on(events.NewMessage(pattern=r"\.who", outgoing=True))
+async def _(event):
+    if not event.message.is_reply:
+        who = await event.get_chat()
+    else:
+        msg = await event.message.get_reply_message()
+        if msg.forward:
+            who = await borg.get_entity(
+                msg.forward.from_id or msg.forward.channel_id)
+        else:
+            who = await borg.get_entity(msg.from_id)
+
+    if isinstance(who, types.User):
+        who_string = who.first_name
+        if who.last_name:
+            who_string += f" {who.last_name}"
+    else:
+        who_string = who.title
+    if isinstance(who, (types.User, types.Channel)) and who.username:
+        who_string += f" (@{who.username})"
+    who_string += f", #{who.id}"
+
+    await event.edit(who_string)