diff --git a/discord/commands/options.py b/discord/commands/options.py
index 936eb34d9c..d6c04faf72 100644
--- a/discord/commands/options.py
+++ b/discord/commands/options.py
@@ -29,7 +29,15 @@
 from typing import TYPE_CHECKING, Literal, Optional, Type, Union
 
 from ..abc import GuildChannel, Mentionable
-from ..channel import CategoryChannel, StageChannel, TextChannel, Thread, VoiceChannel
+from ..channel import (
+    CategoryChannel,
+    DMChannel,
+    ForumChannel,
+    StageChannel,
+    TextChannel,
+    Thread,
+    VoiceChannel,
+)
 from ..enums import ChannelType
 from ..enums import Enum as DiscordEnum
 from ..enums import SlashCommandOptionType
@@ -73,6 +81,8 @@
     StageChannel: ChannelType.stage_voice,
     CategoryChannel: ChannelType.category,
     Thread: ChannelType.public_thread,
+    ForumChannel: ChannelType.forum,
+    DMChannel: ChannelType.private,
 }
 
 
@@ -138,6 +148,10 @@ class Option:
         .. note::
 
             Does not validate the input value against the autocomplete results.
+    channel_types: list[:class:`discord.ChannelType`] | None
+        A list of channel types that can be selected in this option.
+        Only applies to Options with an :attr:`input_type` of :class:`discord.SlashCommandOptionType.channel`.
+        If this argument is used, :attr:`input_type` will be ignored.
     name_localizations: Optional[Dict[:class:`str`, :class:`str`]]
         The name localizations for this option. The values of this should be ``"locale": "name"``.
         See `here <https://discord.com/developers/docs/reference#locales>`_ for a list of valid locales.
@@ -224,11 +238,12 @@ def __init__(
                                 self._raw_type = input_type.__args__  # type: ignore # Union.__args__
                             else:
                                 self._raw_type = (input_type,)
-                        self.channel_types = [
-                            CHANNEL_TYPE_MAP[t]
-                            for t in self._raw_type
-                            if t is not GuildChannel
-                        ]
+                        if not self.channel_types:
+                            self.channel_types = [
+                                CHANNEL_TYPE_MAP[t]
+                                for t in self._raw_type
+                                if t is not GuildChannel
+                            ]
         self.required: bool = (
             kwargs.pop("required", True) if "default" not in kwargs else False
         )
diff --git a/discord/enums.py b/discord/enums.py
index 746a9c86c0..72fdad9102 100644
--- a/discord/enums.py
+++ b/discord/enums.py
@@ -787,6 +787,8 @@ def from_datatype(cls, datatype):
             "CategoryChannel",
             "ThreadOption",
             "Thread",
+            "ForumChannel",
+            "DMChannel",
         ]:
             return cls.channel
         if datatype.__name__ == "Role":