Index: src/views/pages/authorize-interaction.ejs
===================================================================
--- src/views/pages/authorize-interaction.ejs	(revision 5190152c90d2d397b7f87f9c900eae8d8c1e2856)
+++ src/views/pages/authorize-interaction.ejs	(revision 544e9c2cff7bc4f99708d4cc7891946bb798614f)
@@ -204,4 +204,9 @@
         submitLabel: t('fedi.send'),
         rows: 4,
+        participants: (target && target.actor_uri) ? [{
+          uri: target.actor_uri,
+          url: target.actor_url || target.actor_uri,
+          handle: target.actor_handle || '',
+        }] : [],
       }) %>
       <div class="auth-interact-actions"><a href="<%= uri %>" class="btn"><%= t('comments.cancel') %></a></div>