diff --git a/.changeset/gorgeous-keys-heal.md b/.changeset/gorgeous-keys-heal.md
new file mode 100644
index 0000000000..b4d5de00b8
--- /dev/null
+++ b/.changeset/gorgeous-keys-heal.md
@@ -0,0 +1,5 @@
+---
+"@primer/view-components": patch
+---
+
+Add the ability to pass an icon to Dialog `with_show_button`, which will turn it from a Beta::Button to a Beta::IconButton.
diff --git a/app/components/primer/alpha/dialog.rb b/app/components/primer/alpha/dialog.rb
index b4e6741258..4dfc3f3fe7 100644
--- a/app/components/primer/alpha/dialog.rb
+++ b/app/components/primer/alpha/dialog.rb
@@ -53,13 +53,17 @@ class Dialog < Primer::Component
       # Optional button to open the dialog.
       #
       # @param system_arguments [Hash] The same arguments as <%= link_to_component(Primer::Beta::Button) %>.
-      renders_one :show_button, lambda { |**system_arguments|
+      renders_one :show_button, lambda { |icon: nil, **system_arguments|
         system_arguments[:classes] = class_names(
           system_arguments[:classes]
         )
         system_arguments[:id] = "dialog-show-#{@system_arguments[:id]}"
         system_arguments[:data] = (system_arguments[:data] || {}).merge({ "show-dialog-id": @system_arguments[:id] })
-        Primer::Beta::Button.new(**system_arguments)
+        if icon.present?
+          Primer::Beta::IconButton.new(icon: icon, **system_arguments)
+        else
+          Primer::Beta::Button.new(**system_arguments)
+        end
       }
 
       # Header content.
diff --git a/previews/primer/alpha/dialog_preview.rb b/previews/primer/alpha/dialog_preview.rb
index b0d7119b38..29629c5446 100644
--- a/previews/primer/alpha/dialog_preview.rb
+++ b/previews/primer/alpha/dialog_preview.rb
@@ -14,9 +14,14 @@ class DialogPreview < ViewComponent::Preview
       # @param visually_hide_title [Boolean] toggle
       # @param button_text [String] text
       # @param body_text [String] text
-      def playground(title: "Test Dialog", subtitle: nil, size: :medium, button_text: "Show Dialog", body_text: "Content", position: :center, position_narrow: :fullscreen, visually_hide_title: false)
+      # @param icon [Symbol] octicon
+      def playground(title: "Test Dialog", subtitle: nil, size: :medium, button_text: "Show Dialog", body_text: "Content", position: :center, position_narrow: :fullscreen, visually_hide_title: false, icon: nil)
         render(Primer::Alpha::Dialog.new(title: title, subtitle: subtitle, size: size, position: position, position_narrow: position_narrow, visually_hide_title: visually_hide_title)) do |d|
-          d.with_show_button { button_text }
+          if icon.present? && (icon != :none)
+            d.with_show_button(icon: icon, "aria-label": icon.to_s)
+          else
+            d.with_show_button { button_text }
+          end
           d.with_body { body_text }
         end
       end
diff --git a/test/components/primer/alpha/dialog_test.rb b/test/components/primer/alpha/dialog_test.rb
index 7696165ba0..578dd26876 100644
--- a/test/components/primer/alpha/dialog_test.rb
+++ b/test/components/primer/alpha/dialog_test.rb
@@ -2,84 +2,94 @@
 
 require "components/test_helper"
 
-class PrimerAlphaDialogTest < Minitest::Test
-  include Primer::ComponentTestHelpers
-
-  def test_renders_title_and_body
-    render_inline(Primer::Alpha::Dialog.new(title: "Title")) do |component|
-      component.with_body { "Hello" }
-    end
-
-    assert_selector("modal-dialog[role='dialog']") do
-      assert_selector("h1", text: "Title")
-      assert_selector(".Overlay-body", text: "Hello")
-    end
-  end
-
-  def test_renders_show_button
-    render_inline(Primer::Alpha::Dialog.new(title: "Title")) do |component|
-      component.with_body { "Hello" }
-      component.with_show_button { "Show" }
-    end
-
-    assert_selector("[data-show-dialog-id]")
-  end
-
-  def test_raises_on_missing_title
-    error = assert_raises(ArgumentError) do
-      render_inline(Primer::Alpha::Dialog.new)
-    end
-
-    assert_includes(error.message, "missing keyword:")
-    assert_includes(error.message, "title")
-  end
-
-  def test_renders_provided_id
-    render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-id")) do |component|
-      component.with_body { "content" }
-    end
-
-    assert_selector("modal-dialog[id='my-id']")
-  end
-
-  def test_renders_random_id
-    render_inline(Primer::Alpha::Dialog.new(title: "Title")) do |component|
-      component.with_body { "content" }
-    end
-
-    assert_selector("modal-dialog[id^='dialog-']")
-  end
-
-  def test_renders_title_and_subtitle_with_describedby
-    render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-dialog", subtitle: "Subtitle")) do |component|
-      component.with_body { "content" }
-    end
-
-    assert_selector("modal-dialog[id='my-dialog'][aria-describedby='my-dialog-title my-dialog-description']") do
-      assert_selector("h1[id='my-dialog-title']", text: "Title")
-      assert_selector("h2[id='my-dialog-description']", text: "Subtitle")
-    end
-  end
-
-  def test_renders_footer_without_divider_by_default
-    render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-dialog", subtitle: "Subtitle")) do |component|
-      component.with_body { "content" }
-      component.with_footer { "footer" }
-    end
-
-    assert_selector("modal-dialog") do
-      assert_selector(".Overlay-footer:not(.Overlay-footer--divided)")
-    end
-  end
-
-  def test_renders_footer_with_divider_if_show_divider_is_true
-    render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-dialog", subtitle: "Subtitle")) do |component|
-      component.with_body { "content" }
-      component.with_footer(show_divider: true) { "footer" }
-    end
-
-    assert_selector("modal-dialog") do
-      assert_selector(".Overlay-footer.Overlay-footer--divided")
+module Primer
+  module Alpha
+    class DialogTest < Minitest::Test
+      include Primer::ComponentTestHelpers
+
+      def test_renders_title_and_body
+        render_inline(Primer::Alpha::Dialog.new(title: "Title")) do |component|
+          component.with_body { "Hello" }
+        end
+
+        assert_selector("modal-dialog[role='dialog']") do
+          assert_selector("h1", text: "Title")
+          assert_selector(".Overlay-body", text: "Hello")
+        end
+      end
+
+      def test_renders_show_button
+        render_inline(Primer::Alpha::Dialog.new(title: "Title")) do |component|
+          component.with_body { "Hello" }
+          component.with_show_button { "Show" }
+        end
+
+        assert_selector("[data-show-dialog-id]")
+      end
+
+      def test_renders_icon_show_button
+        render_preview :playground, params: { icon: :ellipsis }
+
+        assert_selector("button[data-show-dialog-id] svg.octicon.octicon-ellipsis")
+      end
+
+      def test_raises_on_missing_title
+        error = assert_raises(ArgumentError) do
+          render_inline(Primer::Alpha::Dialog.new)
+        end
+
+        assert_includes(error.message, "missing keyword:")
+        assert_includes(error.message, "title")
+      end
+
+      def test_renders_provided_id
+        render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-id")) do |component|
+          component.with_body { "content" }
+        end
+
+        assert_selector("modal-dialog[id='my-id']")
+      end
+
+      def test_renders_random_id
+        render_inline(Primer::Alpha::Dialog.new(title: "Title")) do |component|
+          component.with_body { "content" }
+        end
+
+        assert_selector("modal-dialog[id^='dialog-']")
+      end
+
+      def test_renders_title_and_subtitle_with_describedby
+        render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-dialog", subtitle: "Subtitle")) do |component|
+          component.with_body { "content" }
+        end
+
+        assert_selector("modal-dialog[id='my-dialog'][aria-describedby='my-dialog-title my-dialog-description']") do
+          assert_selector("h1[id='my-dialog-title']", text: "Title")
+          assert_selector("h2[id='my-dialog-description']", text: "Subtitle")
+        end
+      end
+
+      def test_renders_footer_without_divider_by_default
+        render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-dialog", subtitle: "Subtitle")) do |component|
+          component.with_body { "content" }
+          component.with_footer { "footer" }
+        end
+
+        assert_selector("modal-dialog") do
+          assert_selector(".Overlay-footer:not(.Overlay-footer--divided)")
+        end
+      end
+
+      def test_renders_footer_with_divider_if_show_divider_is_true
+        render_inline(Primer::Alpha::Dialog.new(title: "Title", id: "my-dialog", subtitle: "Subtitle")) do |component|
+          component.with_body { "content" }
+          component.with_footer(show_divider: true) { "footer" }
+        end
+
+        assert_selector("modal-dialog") do
+          assert_selector(".Overlay-footer.Overlay-footer--divided")
+        end
+      end
     end
   end
 end