diff --git a/astro.config.mjs b/astro.config.mjs
index 85bd53eb..6765e82b 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -27,6 +27,8 @@ export default defineConfig({
       tableOfContents: { minHeadingLevel: 2, maxHeadingLevel: 4 },
       components: {
         Footer: './src/components/overrides/Footer.astro',
+        Header: './src/components/overrides/Header.astro',
+        MobileMenuFooter: './src/components/overrides/MobileMenuFooter.astro',
         Sidebar: './src/components/overrides/Sidebar.astro',
         SocialIcons: './src/components/overrides/SocialIcons.astro'
       }
diff --git a/cypress/e2e/release-badge.cy.js b/cypress/e2e/release-badge.cy.js
new file mode 100644
index 00000000..e9cf6c2b
--- /dev/null
+++ b/cypress/e2e/release-badge.cy.js
@@ -0,0 +1,38 @@
+const releaseUrl =
+  'https://github.com/archivesspace/archivesspace/releases/latest'
+const title = 'Go to the latest ArchivesSpace release'
+const badgeSrc = `https://img.shields.io/github/v/release/archivesspace/archivesspace?label=ArchivesSpace&color=007595`
+const altText = 'The latest ArchivesSpace release version'
+
+describe('Release Badge', () => {
+  it('displays the release badge with the correct data in the header on desktop', () => {
+    cy.visit('/')
+    cy.get(
+      '.page > header:first-child > div:first-child > div:nth-child(3) > a:first-child'
+    )
+      .should('have.attr', 'href', releaseUrl)
+      .should('have.attr', 'title', title)
+      .within(() => {
+        cy.get('img')
+          .should('have.attr', 'src', badgeSrc)
+          .should('have.attr', 'alt', altText)
+      })
+  })
+
+  it(
+    'displays the release badge with the correct data in the mobile menu footer',
+    { viewportWidth: 400 },
+    () => {
+      cy.visit('/')
+      cy.get('button[aria-label="Menu"]').click()
+      cy.get('#starlight__sidebar .mobile-preferences > a:first-child')
+        .should('have.attr', 'href', releaseUrl)
+        .should('have.attr', 'title', title)
+        .within(() => {
+          cy.get('img')
+            .should('have.attr', 'src', badgeSrc)
+            .should('have.attr', 'alt', altText)
+        })
+    }
+  )
+})
diff --git a/src/components/ReleaseBadge.astro b/src/components/ReleaseBadge.astro
new file mode 100644
index 00000000..c1f8ac95
--- /dev/null
+++ b/src/components/ReleaseBadge.astro
@@ -0,0 +1,28 @@
+---
+const releaseUrl =
+  'https://github.com/archivesspace/archivesspace/releases/latest'
+const label = 'ArchivesSpace'
+const color = '007595' // dark `--sl-color-accent` via custom.css
+const badgeSrc = `https://img.shields.io/github/v/release/archivesspace/archivesspace?label=${label}&color=${color}`
+const altText = 'The latest ArchivesSpace release version'
+const title = 'Go to the latest ArchivesSpace release'
+---
+
+<a href={releaseUrl} title={title}>
+  <img alt={altText} src={badgeSrc} />
+</a>
+
+<style>
+  a {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+  }
+  @media (min-width: 800px) {
+    a::after {
+      content: '';
+      height: 2rem;
+      border-inline-end: 1px solid var(--as-color-hairline);
+    }
+  }
+</style>
diff --git a/src/components/overrides/Header.astro b/src/components/overrides/Header.astro
new file mode 100644
index 00000000..2235b117
--- /dev/null
+++ b/src/components/overrides/Header.astro
@@ -0,0 +1,105 @@
+---
+// Via https://github.com/withastro/starlight/blob/23bf960aed36445600b6ccecb2138a5b461e2929/packages/starlight/components/Header.astro
+
+import config from 'virtual:starlight/user-config'
+import type { Props } from '@astrojs/starlight/props'
+
+import LanguageSelect from '@astrojs/starlight/components/LanguageSelect.astro'
+import Search from '@astrojs/starlight/components/Search.astro'
+import SiteTitle from '@astrojs/starlight/components/SiteTitle.astro'
+import ReleaseBadge from '../ReleaseBadge.astro'
+import SocialIcons from './SocialIcons.astro'
+import ThemeSelect from '@astrojs/starlight/components/ThemeSelect.astro'
+
+/**
+ * Render the `Search` component if Pagefind is enabled or the default search component has been overridden.
+ */
+const shouldRenderSearch =
+  config.pagefind ||
+  config.components.Search !== '@astrojs/starlight/components/Search.astro'
+---
+
+<div class="header sl-flex">
+  <div class="title-wrapper sl-flex">
+    <SiteTitle {...Astro.props} />
+  </div>
+  <div class="sl-flex print:hidden">
+    {shouldRenderSearch && <Search {...Astro.props} />}
+  </div>
+  <div class="sl-hidden md:sl-flex print:hidden right-group">
+    <ReleaseBadge />
+    <div class="sl-flex social-icons">
+      <SocialIcons {...Astro.props} />
+    </div>
+    <ThemeSelect {...Astro.props} />
+    <LanguageSelect {...Astro.props} />
+  </div>
+</div>
+
+<style>
+  .header {
+    gap: var(--sl-nav-gap);
+    justify-content: space-between;
+    align-items: center;
+    height: 100%;
+  }
+
+  .title-wrapper {
+    /* Prevent long titles overflowing and covering the search and menu buttons on narrow viewports. */
+    overflow: clip;
+    /* Avoid clipping focus ring around link inside title wrapper. */
+    padding: 0.25rem;
+    margin: -0.25rem;
+    min-width: 0;
+  }
+
+  .right-group,
+  .social-icons {
+    gap: 1rem;
+    align-items: center;
+  }
+  .social-icons::after {
+    content: '';
+    height: 2rem;
+    border-inline-end: 1px solid var(--sl-color-gray-5);
+  }
+
+  @media (min-width: 50rem) {
+    :global(:root[data-has-sidebar]) {
+      --__sidebar-pad: calc(2 * var(--sl-nav-pad-x));
+    }
+    :global(:root:not([data-has-toc])) {
+      --__toc-width: 0rem;
+    }
+    .header {
+      --__sidebar-width: max(
+        0rem,
+        var(--sl-content-inline-start, 0rem) - var(--sl-nav-pad-x)
+      );
+      --__main-column-fr: calc(
+        (
+            100% + var(--__sidebar-pad, 0rem) -
+              var(--__toc-width, var(--sl-sidebar-width)) -
+              (2 * var(--__toc-width, var(--sl-nav-pad-x))) -
+              var(--sl-content-inline-start, 0rem) - var(--sl-content-width)
+          ) /
+          2
+      );
+      display: grid;
+      grid-template-columns:
+        /* 1 (site title): runs up until the main content column’s left edge or the width of the title, whichever is the largest  */
+        minmax(
+          calc(
+            var(--__sidebar-width) +
+              max(0rem, var(--__main-column-fr) - var(--sl-nav-gap))
+          ),
+          auto
+        )
+        /* 2 (search box): all free space that is available. */
+        1fr
+        /* 3 (right items): use the space that these need. */
+        auto;
+      align-content: center;
+    }
+  }
+</style>
diff --git a/src/components/overrides/MobileMenuFooter.astro b/src/components/overrides/MobileMenuFooter.astro
new file mode 100644
index 00000000..47675b08
--- /dev/null
+++ b/src/components/overrides/MobileMenuFooter.astro
@@ -0,0 +1,37 @@
+---
+// Via https://github.com/withastro/starlight/blob/490c6eff34ab408c4f55777b7b0caa16787dd3d4/packages/starlight/components/MobileMenuFooter.astro
+
+import type { Props } from '@astrojs/starlight/props'
+import LanguageSelect from '@astrojs/starlight/components/LanguageSelect.astro'
+import ReleaseBadge from '../ReleaseBadge.astro'
+import SocialIcons from './SocialIcons.astro'
+import ThemeSelect from '@astrojs/starlight/components/ThemeSelect.astro'
+---
+
+<div class="mobile-preferences sl-flex">
+  <ReleaseBadge />
+  <div class="sl-flex social-icons">
+    <SocialIcons {...Astro.props} />
+  </div>
+  <ThemeSelect {...Astro.props} />
+  <LanguageSelect {...Astro.props} />
+</div>
+
+<style>
+  .social-icons {
+    margin-inline-end: auto;
+    gap: 1rem;
+    align-items: center;
+    padding-block: 1rem;
+  }
+  .social-icons:empty {
+    display: none;
+  }
+  .mobile-preferences {
+    justify-content: space-between;
+    flex-wrap: wrap;
+    border-top: 1px solid var(--sl-color-gray-6);
+    column-gap: 1rem;
+    padding: 0.5rem 0;
+  }
+</style>
diff --git a/src/utils/gitMetadata.mjs b/src/utils/gitMetadata.mjs
index 5662d348..41020958 100644
--- a/src/utils/gitMetadata.mjs
+++ b/src/utils/gitMetadata.mjs
@@ -1,5 +1,5 @@
-import { exec } from 'child_process'
-import { promisify } from 'util'
+import { exec } from 'node:child_process'
+import { promisify } from 'node:util'
 
 const execPromise = promisify(exec)