diff --git a/discord/commands/core.py b/discord/commands/core.py
index a5124654b3..125c23ac0f 100644
--- a/discord/commands/core.py
+++ b/discord/commands/core.py
@@ -56,7 +56,7 @@
 from ..enums import SlashCommandOptionType, ChannelType
 from ..errors import ValidationError, ClientException
 from ..member import Member
-from ..message import Message
+from ..message import Attachment, Message
 from ..user import User
 from ..utils import find, get_or_fetch, async_all, utcnow
 
@@ -752,6 +752,11 @@ async def _invoke(self, ctx: ApplicationContext) -> None:
             elif op.input_type == SlashCommandOptionType.string and (converter := op.converter) is not None:
                 arg = await converter.convert(converter, ctx, arg)
 
+            elif op.input_type == SlashCommandOptionType.attachment:
+                _data = ctx.interaction.data["resolved"]["attachments"][arg]
+                _data["id"] = int(arg)
+                arg = Attachment(state=ctx.interaction._state, data=_data)
+
             kwargs[op._parameter_name] = arg
 
         for o in self.options:
diff --git a/discord/enums.py b/discord/enums.py
index 1c90a8dcfb..6f657f3215 100644
--- a/discord/enums.py
+++ b/discord/enums.py
@@ -665,6 +665,8 @@ def from_datatype(cls, datatype):
             return cls.channel
         if datatype.__name__ == "Role":
             return cls.role
+        if datatype.__name__ == "Attachment":
+            return cls.attachment
         if datatype.__name__ == "Mentionable":
             return cls.mentionable
 
diff --git a/discord/types/interactions.py b/discord/types/interactions.py
index 716427494e..54b427eb4a 100644
--- a/discord/types/interactions.py
+++ b/discord/types/interactions.py
@@ -26,6 +26,8 @@
 from __future__ import annotations
 
 from typing import Optional, TYPE_CHECKING, Dict, TypedDict, Union, List, Literal
+
+from .message import Attachment
 from .snowflake import Snowflake
 from .components import Component, ComponentType
 from .embed import Embed
@@ -57,7 +59,7 @@ class _ApplicationCommandOptionOptional(TypedDict, total=False):
     options: List[ApplicationCommandOption]
 
 
-ApplicationCommandOptionType = Literal[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+ApplicationCommandOptionType = Literal[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
 
 
 class ApplicationCommandOption(_ApplicationCommandOptionOptional):
@@ -122,7 +124,7 @@ class _ApplicationCommandInteractionDataOptionBoolean(_ApplicationCommandInterac
 
 
 class _ApplicationCommandInteractionDataOptionSnowflake(_ApplicationCommandInteractionDataOption):
-    type: Literal[6, 7, 8, 9]
+    type: Literal[6, 7, 8, 9, 11]
     value: Snowflake
 
 
@@ -153,6 +155,7 @@ class ApplicationCommandInteractionDataResolved(TypedDict, total=False):
     members: Dict[Snowflake, Member]
     roles: Dict[Snowflake, Role]
     channels: Dict[Snowflake, ApplicationCommandResolvedPartialChannel]
+    attachments: Dict[Snowflake, Attachment]
 
 
 class _ApplicationCommandInteractionDataOptional(TypedDict, total=False):
diff --git a/discord/types/message.py b/discord/types/message.py
index ea14695f77..e4cfa89b72 100644
--- a/discord/types/message.py
+++ b/discord/types/message.py
@@ -25,7 +25,7 @@
 
 from __future__ import annotations
 
-from typing import List, Literal, Optional, TypedDict, Union
+from typing import List, Literal, Optional, TypedDict, Union, TYPE_CHECKING
 from .snowflake import Snowflake, SnowflakeList
 from .member import Member, UserWithMember
 from .user import User
@@ -33,9 +33,11 @@
 from .embed import Embed
 from .channel import ChannelType
 from .components import Component
-from .interactions import MessageInteraction
 from .sticker import StickerItem
 
+if TYPE_CHECKING:
+    from .interactions import MessageInteraction
+
 
 class ChannelMention(TypedDict):
     id: Snowflake