diff --git a/packages/discord.js/src/structures/Attachment.js b/packages/discord.js/src/structures/Attachment.js
index 11a456431..086d7a870 100644
--- a/packages/discord.js/src/structures/Attachment.js
+++ b/packages/discord.js/src/structures/Attachment.js
@@ -99,6 +99,28 @@ class Attachment {
      * @type {boolean}
      */
     this.ephemeral = data.ephemeral ?? false;
+
+    if ('duration_secs' in data) {
+      /**
+       * The duration of this attachment in seconds
+       * <info>This will only be available if the attachment is an audio file.</info>
+       * @type {?number}
+       */
+      this.duration = data.duration_secs;
+    } else {
+      this.duration ??= null;
+    }
+
+    if ('waveform' in data) {
+      /**
+       * The base64 encoded byte array representing a sampled waveform
+       * <info>This will only be available if the attachment is an audio file.</info>
+       * @type {?string}
+       */
+      this.waveform = data.waveform;
+    } else {
+      this.waveform ??= null;
+    }
   }
 
   /**
diff --git a/packages/discord.js/typings/index.d.ts b/packages/discord.js/typings/index.d.ts
index da87693c7..8d4eacc1d 100644
--- a/packages/discord.js/typings/index.d.ts
+++ b/packages/discord.js/typings/index.d.ts
@@ -2014,6 +2014,7 @@ export class Attachment {
   private attachment: BufferResolvable | Stream;
   public contentType: string | null;
   public description: string | null;
+  public duration: number | null;
   public ephemeral: boolean;
   public height: number | null;
   public id: Snowflake;
@@ -2022,6 +2023,7 @@ export class Attachment {
   public size: number;
   public get spoiler(): boolean;
   public url: string;
+  public waveform: string | null;
   public width: number | null;
   public toJSON(): unknown;
 }