diff --git a/app/controllers/comments_controller.rb b/app/controllers/comments_controller.rb
index 766995515..1b23c6839 100644
--- a/app/controllers/comments_controller.rb
+++ b/app/controllers/comments_controller.rb
@@ -1,2 +1,19 @@
 class CommentsController < ApplicationController
+  before_action :set_splat
+
+  def create
+    @comment = @splat.comments.create(comment_params)
+    @comment.save
+
+    redirect_to splat_path(@splat)
+  end
+
+  private
+    def comment_params
+      params.require(:comment).permit(:body)
+    end
+
+    def set_splat
+      @splat = Splat.find(params[:splat_id])
+    end
 end
diff --git a/app/views/comments/_new.html.erb b/app/views/comments/_new.html.erb
new file mode 100644
index 000000000..9e4b19819
--- /dev/null
+++ b/app/views/comments/_new.html.erb
@@ -0,0 +1,18 @@
+<div class="comment flex align-start gap">
+  <div class="flex align-center gap full-width">
+    <span class="avatar fill-black txt-reversed flex-item-no-shrink"><strong><%= Current.user.initials %></strong></span>
+    <header class="full-width flex align-center gap">
+      <strong><%= Current.user.name %></strong>
+    </header>
+  </div>
+  <div class="comment__body txt-align-start full-width">
+    <%= form_with model: [@splat, @splat.comments.build], class: "flex flex-column gap full-width" do | form | %>
+      <%= form.text_area :body, class: "input full-width", required: true, placeholder: "Type your comment…", rows: 4, autofocus: true %>
+
+      <%= form.button class: "btn btn--reversed center" do %>
+        <%= image_tag "check.svg", aria: { hidden: "true" }, size: 24%>
+        <span class="for-screen-reader">Save</span>
+      <% end %>
+    <% end %>
+  </div>
+</div>
diff --git a/app/views/splats/show.html.erb b/app/views/splats/show.html.erb
index 1566a1951..3ccb94beb 100644
--- a/app/views/splats/show.html.erb
+++ b/app/views/splats/show.html.erb
@@ -40,8 +40,5 @@
   <hr />
   <%= render @splat.comments %>
 
-  <button class="btn btn--positive center">
-    <%= image_tag "add.svg", aria: { hidden: true }, size: 24 %>
-    <span class="for-screen-reader">Add a comment</span>
-  </button>
+  <%= render "comments/new" %>
 </section>
diff --git a/config/routes.rb b/config/routes.rb
index c1ef5b0e3..12b7555b3 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -5,6 +5,7 @@ Rails.application.routes.draw do
 
   resources :splats do
     resources :categories, shallow: true
+    resources :comments
   end
 
   resources :categories, only: :index