diff --git a/pyrogram/client/methods/chats/__init__.py b/pyrogram/client/methods/chats/__init__.py
index 13829029..b47385c4 100644
--- a/pyrogram/client/methods/chats/__init__.py
+++ b/pyrogram/client/methods/chats/__init__.py
@@ -31,6 +31,7 @@ from .get_chat_members import GetChatMembers
 from .get_chat_members_count import GetChatMembersCount
 from .get_dialogs import GetDialogs
 from .get_dialogs_count import GetDialogsCount
+from .get_nearby_chats import GetNearbyChats
 from .iter_chat_members import IterChatMembers
 from .iter_dialogs import IterDialogs
 from .join_chat import JoinChat
@@ -43,11 +44,11 @@ from .set_chat_description import SetChatDescription
 from .set_chat_permissions import SetChatPermissions
 from .set_chat_photo import SetChatPhoto
 from .set_chat_title import SetChatTitle
+from .set_custom_title import SetCustomTitle
 from .unarchive_chats import UnarchiveChats
 from .unban_chat_member import UnbanChatMember
 from .unpin_chat_message import UnpinChatMessage
 from .update_chat_username import UpdateChatUsername
-from .get_nearby_chats import GetNearbyChats
 
 
 class Chats(
@@ -82,6 +83,7 @@ class Chats(
     AddChatMembers,
     DeleteChannel,
     DeleteSupergroup,
-    GetNearbyChats
+    GetNearbyChats,
+    SetCustomTitle
 ):
     pass
diff --git a/pyrogram/client/methods/chats/promote_chat_member.py b/pyrogram/client/methods/chats/promote_chat_member.py
index 9394841b..69562aec 100644
--- a/pyrogram/client/methods/chats/promote_chat_member.py
+++ b/pyrogram/client/methods/chats/promote_chat_member.py
@@ -97,7 +97,8 @@ class PromoteChatMember(BaseClient):
                     invite_users=can_invite_users or None,
                     pin_messages=can_pin_messages or None,
                     add_admins=can_promote_members or None,
-                )
+                ),
+                rank=""
             )
         )
 
diff --git a/pyrogram/client/methods/chats/set_custom_title.py b/pyrogram/client/methods/chats/set_custom_title.py
new file mode 100644
index 00000000..f13e667a
--- /dev/null
+++ b/pyrogram/client/methods/chats/set_custom_title.py
@@ -0,0 +1,90 @@
+# Pyrogram - Telegram MTProto API Client Library for Python
+# Copyright (C) 2017-2019 Dan Tès <https://github.com/delivrance>
+#
+# This file is part of Pyrogram.
+#
+# Pyrogram is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Pyrogram is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
+
+from typing import Union
+
+from pyrogram.api import functions, types
+from ...ext import BaseClient
+
+
+class SetCustomTitle(BaseClient):
+    def set_custom_title(
+        self,
+        chat_id: Union[int, str],
+        user_id: Union[int, str],
+        title: str,
+    ) -> bool:
+        """Set a custom title to administrators or owners of a supergroup.
+
+        Parameters:
+            chat_id (``int`` | ``str``):
+                Unique identifier (int) or username (str) of the target chat.
+
+            user_id (``int`` | ``str``):
+                Unique identifier (int) or username (str) of the target user.
+                For a contact that exists in your Telegram address book you can use his phone number (str).
+
+            title (``str``, *optional*):
+                A custom title that will be shown to all members instead of "Owner" or "Admin".
+                Pass None or "" (empty string) to remove the custom title.
+
+        Returns:
+            ``bool``: True on success.
+
+        Example:
+            .. code-block:: python
+
+                # Set custom titles to owners or administrators of supergroups
+                app.set_custom_title(chat_id, user_id, "Custom Title")
+        """
+        chat_id = self.resolve_peer(chat_id)
+        user_id = self.resolve_peer(user_id)
+
+        r = self.send(
+            functions.channels.GetParticipant(
+                channel=chat_id,
+                user_id=user_id
+            )
+        ).participant
+
+        if isinstance(r, types.ChannelParticipantCreator):
+            admin_rights = types.ChatAdminRights(
+                change_info=True,
+                post_messages=True,
+                edit_messages=True,
+                delete_messages=True,
+                ban_users=True,
+                invite_users=True,
+                pin_messages=True,
+                add_admins=True,
+            )
+        elif isinstance(r, types.ChannelParticipantAdmin):
+            admin_rights = r.admin_rights
+        else:
+            raise ValueError("Custom titles can only be applied to owners or administrators of supergroups")
+
+        self.send(
+            functions.channels.EditAdmin(
+                channel=chat_id,
+                user_id=user_id,
+                admin_rights=admin_rights,
+                rank=title
+            )
+        )
+
+        return True