diff --git a/lib/models/index.d.ts b/lib/models/index.d.ts
index 4287ad5..a5996b9 100644
--- a/lib/models/index.d.ts
+++ b/lib/models/index.d.ts
@@ -364,6 +364,10 @@ export interface MessageCreateOptions {
    * The email address to which the email will be sent. Must be a verified email address.
    */
   to?: string;
+  /**
+   * The email address to which the email will be CC'd to. Must be a verified email address.
+   */
+  cc?: string;
   /**
    * Allows for the partial override of the message's 'from' address. This **must** be an address ending with `YOUR_SERVER.mailosaur.net`, such as `my-emails@a1bcdef2.mailosaur.net`.
    */
@@ -398,6 +402,10 @@ export interface MessageForwardOptions {
    * The email address to which the email will be sent. Must be a verified email address.
    */
   to: string;
+  /**
+   * The email address to which the email will be CC'd to. Must be a verified email address.
+   */
+  cc?: string;
   /**
    * Any plain text to include when forwarding the message. Note that only text or html can be supplied, not both.
    */
@@ -412,6 +420,10 @@ export interface MessageForwardOptions {
  * Options to use when replying to a message.
  */
 export interface MessageReplyOptions {
+  /**
+   * The email address to which the email will be CC'd to. Must be a verified email address.
+   */
+  cc?: string;
   /**
    * Any additional plain text content to include in the reply. Note that only text or html can be supplied, not both.
    */
diff --git a/lib/models/messageCreateOptions.js b/lib/models/messageCreateOptions.js
index 42e61f1..fdb3211 100644
--- a/lib/models/messageCreateOptions.js
+++ b/lib/models/messageCreateOptions.js
@@ -1,6 +1,7 @@
 class MessageCreateOptions {
   constructor(data = {}) {
     this.to = data.to;
+    this.cc = data.cc;
     this.from = data.from;
     this.send = data.send;
     this.subject = data.subject;
diff --git a/lib/models/messageForwardOptions.js b/lib/models/messageForwardOptions.js
index f1e8104..9e677f6 100644
--- a/lib/models/messageForwardOptions.js
+++ b/lib/models/messageForwardOptions.js
@@ -1,6 +1,7 @@
 class MessageForwardOptions {
   constructor(data = {}) {
     this.to = data.to;
+    this.cc = data.cc;
     this.text = data.text;
     this.html = data.html;
   }
diff --git a/lib/models/messageReplyOptions.js b/lib/models/messageReplyOptions.js
index 374d48c..f49cf48 100644
--- a/lib/models/messageReplyOptions.js
+++ b/lib/models/messageReplyOptions.js
@@ -3,6 +3,7 @@ class MessageReplyOptions {
     this.text = data.text;
     this.html = data.html;
     this.attachments = data.attachments;
+    this.cc = data.cc;
   }
 }
 
diff --git a/test/emails.js b/test/emails.js
index 0537b17..8d1fc3a 100644
--- a/test/emails.js
+++ b/test/emails.js
@@ -383,6 +383,22 @@ describe('emails', () => {
       assert.equal(message.subject, subject);
     });
 
+    it('send with HTML content to CC recipient', async () => {
+      const subject = 'CC Message';
+      const ccRecipient = `someoneelse@${verifiedDomain}`;
+      const message = await client.messages.create(server, {
+        to: `anything@${verifiedDomain}`,
+        send: true,
+        subject,
+        cc: ccRecipient,
+        html: '<p>This is a new email.</p>'
+      });
+      assert.isNotEmpty(message.id);
+      assert.equal(message.subject, subject);
+      assert.equal(message.cc.length, 1);
+      assert.equal(message.cc[0].email, ccRecipient);
+    });
+
     it('send with attachment', async () => {
       const subject = 'New message with attachment';
 
@@ -434,6 +450,22 @@ describe('emails', () => {
       assert.isNotEmpty(message.id);
       assert.isTrue(message.html.body.indexOf(body) >= 0);
     });
+
+    it('forward with HTML content to CC recipient', async () => {
+      const targetEmailId = emails[0].id;
+      const body = '<p>Forwarded <strong>HTML</strong> message.</p>';
+      const ccRecipient = `someoneelse@${verifiedDomain}`;
+
+      const message = await client.messages.forward(targetEmailId, {
+        to: `anything@${verifiedDomain}`,
+        html: body,
+        cc: ccRecipient
+      });
+      assert.isNotEmpty(message.id);
+      assert.isTrue(message.html.body.indexOf(body) >= 0);
+      assert.equal(message.cc.length, 1);
+      assert.equal(message.cc[0].email, ccRecipient);
+    });
   });
 
   (verifiedDomain ? describe : describe.skip)('reply', () => {
@@ -459,6 +491,21 @@ describe('emails', () => {
       assert.isTrue(message.html.body.indexOf(body) >= 0);
     });
 
+    it('reply with HTML content to CC recipient', async () => {
+      const targetEmailId = emails[0].id;
+      const body = '<p>Reply <strong>HTML</strong> message.</p>';
+      const ccRecipient = `someoneelse@${verifiedDomain}`;
+
+      const message = await client.messages.reply(targetEmailId, {
+        html: body,
+        cc: ccRecipient
+      });
+      assert.isNotEmpty(message.id);
+      assert.isTrue(message.html.body.indexOf(body) >= 0);
+      assert.equal(message.cc.length, 1);
+      assert.equal(message.cc[0].email, ccRecipient);
+    });
+
     it('reply with attachment', async () => {
       const targetEmailId = emails[0].id;