diff --git a/wp-content/themes/twentyseventeen/assets/js/customize-preview.js b/wp-content/themes/twentyseventeen/assets/js/customize-preview.js
index 74b4072b71..4981980b5d 100644
--- a/wp-content/themes/twentyseventeen/assets/js/customize-preview.js
+++ b/wp-content/themes/twentyseventeen/assets/js/customize-preview.js
@@ -102,4 +102,32 @@
 			}
 		} );
 	} );
+
+	// Whether a header image is available.
+	function hasHeaderImage() {
+		var image = wp.customize( 'header_image' )();
+		return '' !== image && 'remove-header' !== image;
+	}
+
+	// Whether a header video is available.
+	function hasHeaderVideo() {
+		var externalVideo = wp.customize( 'external_header_video' )(),
+			video = wp.customize( 'header_video' )();
+
+		return '' !== externalVideo || ( 0 !== video && '' !== video );
+	}
+
+	// Toggle a body class if a custom header exists.
+	$.each( [ 'external_header_video', 'header_image', 'header_video' ], function( index, settingId ) {
+		wp.customize( settingId, function( setting ) {
+			setting.bind(function() {
+				if ( hasHeaderImage() || ( hasHeaderVideo() && $( 'body' ).hasClass( 'twentyseventeen-front-page' ) ) ) {
+					$( document.body ).addClass( 'has-header-image' );
+				} else {
+					$( document.body ).removeClass( 'has-header-image' );
+				}
+			} );
+		} );
+	} );
+
 } )( jQuery );
diff --git a/wp-content/themes/twentyseventeen/style.css b/wp-content/themes/twentyseventeen/style.css
index 96db6648c9..61eb2f4262 100644
--- a/wp-content/themes/twentyseventeen/style.css
+++ b/wp-content/themes/twentyseventeen/style.css
@@ -1690,8 +1690,10 @@ body:not(.title-tagline-hidden) .site-branding-text {
 	transform: translateX(-50%) translateY(0);
 }
 
+/* Hides div in Customizer preview when header images or videos change. */
+
 body:not(.has-header-image) .custom-header-image {
-	padding: 5% 0;
+	display: none;
 }
 
 .has-header-image.twentyseventeen-front-page .site-branding,
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8087608771..b8ba8bd947 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta3-39219';
+$wp_version = '4.7-beta3-39220';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.