diff --git a/app.rb b/app.rb
index 2763df42..f522edaa 100644
--- a/app.rb
+++ b/app.rb
@@ -862,7 +862,7 @@ post '/event/:event_id/toggle_like' do |event_id|
   content_type :json
   event = Event[id: event_id]
   liked_response = event.toggle_site_like(current_site) ? 'liked' : 'unliked'
-  {result: liked_response, event_like_count: event.likes_dataset.count}.to_json
+  {result: liked_response, event_like_count: event.likes_dataset.count, liking_site_names: event.liking_site_names}.to_json
 end
 
 post '/event/:event_id/comment' do |event_id|
diff --git a/models/event.rb b/models/event.rb
index c5294931..274ad004 100644
--- a/models/event.rb
+++ b/models/event.rb
@@ -7,23 +7,27 @@ class Event < Sequel::Model
   many_to_one :profile_comment
   one_to_many :likes
   one_to_many :comments
-  
+
+  def liking_site_names
+    likes.collect {|like| like.actioning_site.username }
+  end
+
   def add_site_comment(site, message)
     add_comment actioning_site_id: site.id, message: message
   end
-  
+
   def site_likes?(site)
     likes_dataset.filter(actioning_site_id: site.id).count > 0
   end
-  
+
   def site_like(site)
     add_like actioning_site_id: site.id
   end
-  
+
   def site_unlike(site)
     likes_dataset.filter(actioning_site_id: site.id).delete
   end
-  
+
   def toggle_site_like(site)
     if site_likes? site
       site_unlike site
diff --git a/models/like.rb b/models/like.rb
index 2d5815a5..b2a5c005 100644
--- a/models/like.rb
+++ b/models/like.rb
@@ -1,3 +1,4 @@
 class Like < Sequel::Model
   many_to_one :event
+  many_to_one :actioning_site, class: :Site
 end
\ No newline at end of file
diff --git a/public/assets/css/_base-sass/_basic.scss b/public/assets/css/_base-sass/_basic.scss
index e4053e6e..d4dcd6dd 100644
--- a/public/assets/css/_base-sass/_basic.scss
+++ b/public/assets/css/_base-sass/_basic.scss
@@ -22,3 +22,7 @@ hr{border-top:1px solid #ddd; display:block; height:1px; margin:$spacing*6 0}
 @import 'base-Media';		// Styling for base media elements
 @import 'typography';		// Styling for base typographical elements
 @import 'base-Form';		// Styling for base form elements
+
+.tooltip-inner {
+  white-space:pre-wrap;
+}
\ No newline at end of file
diff --git a/public/assets/css/neo.css b/public/assets/css/neo.css
index 7ff43bf7..97f1eb7e 100644
--- a/public/assets/css/neo.css
+++ b/public/assets/css/neo.css
@@ -176,6 +176,9 @@ textarea {
   overflow: auto;
   vertical-align: top; }
 
+.tooltip-inner {
+  white-space: pre-wrap; }
+
 table {
   border-collapse: collapse;
   border-spacing: 0; }
diff --git a/public/assets/scripts/news/like.js b/public/assets/scripts/news/like.js
index cc8569ae..dd7b2624 100644
--- a/public/assets/scripts/news/like.js
+++ b/public/assets/scripts/news/like.js
@@ -18,5 +18,6 @@ Like.prototype.toggleLike = function() {
 
       self.link.text(linkText)
     }
+    self.link.attr('data-original-title', res.liking_site_names.join('<br>'))
   })
 }
\ No newline at end of file
diff --git a/views/_news_actions.erb b/views/_news_actions.erb
index ae9881c3..b18e2238 100644
--- a/views/_news_actions.erb
+++ b/views/_news_actions.erb
@@ -1,6 +1,6 @@
 <div id="event_<%= event.id %>_actions" class="actions">
   <% if current_site %>
-    <a href="#" id="like" onclick="new Like(<%= event.id %>, '<%= csrf_token %>').toggleLike(); return false"><%= event.site_likes?(current_site) ? 'Unlike' : 'Like' %><%= event.likes_dataset.count > 0 ? " (#{event.likes_dataset.count})" : '' %></a>
+    <a href="#" id="like" data-placement="bottom" data-toggle="tooltip" data-original-title="<%= event.liking_site_names.join('<br>') %>" onclick="new Like(<%= event.id %>, '<%= csrf_token %>').toggleLike(); return false"><%= event.site_likes?(current_site) ? 'Unlike' : 'Like' %><%= event.likes_dataset.count > 0 ? " (#{event.likes_dataset.count})" : '' %></a>
   <% else %>
     <% event_like_count = event.likes_dataset.count %>
     <% if event_like_count > 0 %>
diff --git a/views/layout.erb b/views/layout.erb
index b5e863f1..a534fb65 100644
--- a/views/layout.erb
+++ b/views/layout.erb
@@ -54,5 +54,9 @@
     <script src="/assets/scripts/underscore-min.js"></script>
     <script src="/assets/scripts/nav.min.js"></script>
     <script src="/js/bootstrap.min.js"></script>
+
+    <script>
+      $("a#like").tooltip({html: true})
+    </script>
   </body>
 </html>