diff --git a/setup.py b/setup.py
index f1b0d30..969eae5 100644
--- a/setup.py
+++ b/setup.py
@@ -19,6 +19,8 @@ setup(
                         'sshpubkeys==2.2.0',
                         'psycopg2==2.6.2',
                         'requests==2.12.5',
-                        'gunicorn==19.6.0'],
+                        'gunicorn==19.6.0',
+                        'Mastodon.py==1.1.1',
+                        'tweepy==3.5.0'],
     include_package_data = True,
 )
diff --git a/ttadmin/common/social.py b/ttadmin/common/social.py
new file mode 100644
index 0000000..72966d8
--- /dev/null
+++ b/ttadmin/common/social.py
@@ -0,0 +1,66 @@
+import re
+
+from mastodon import Mastodon
+import tweepy
+
+from django.conf import settings
+
+mastodon = Mastodon(
+    client_id=settings.MASTO_CLIENT_ID,
+    client_secret=settings.MASTO_CLIENT_SECRET,
+    access_token=settings.MASTO_ACCESS_TOKEN,
+    api_base_url=settings.MASTO_BASE_URL
+)
+
+tw_auth = tweepy.OAuthHandler(settings.TWITTER_CONSUMER_KEY, settings.TWITTER_CONSUMER_SECRET)
+tw_auth.set_access_token(settings.TWITTER_TOKEN, settings.TWITTER_TOKEN_SECRET)
+twitter = tweepy.API(tw_auth)
+
+def split_posts_by_length(text, length):
+    pattern = '.{,%d}(?:\s|$)' % length - 1
+    chunks = re.findall(pattern, text)
+    posts = []
+    post = ''
+    for chunk in chunks:
+        if len(post + chunk) <= length:
+            post += chunk
+        else:
+            posts.append(post)
+            post = chunk
+    if post:
+        posts.append(post)
+    return posts
+
+
+def post_to_mastodon(message):
+    posts = split_posts_by_length(message, 500)
+    status_info = None
+    for post in posts:
+        if status_info:
+            status_info = mastodon.status_post(post, in_reply_to_id=status_info['id'])
+        else:
+            status_info = mastodon.status_post(post)
+
+
+def post_to_twitter(message):
+    posts = split_posts_by_length(message, 140)
+    status_info = None
+    for post in posts:
+        if status_info:
+            status_info = twitter.update_status(post, in_reply_to_status_id=status_info.id)
+        else:
+            status_info = twitter.update_status(post)
+
+
+def post_users_to_social(qs):
+    users = ''
+    for townie in qs:
+        users += '~{}\n'.format(townie.username)
+    users = users.strip()
+    if len(qs) > 1:
+        message = 'Welcome new users!!!\n\n{}'.format(users)
+    else:
+        message = 'Welcome new user {}!'.format(users)
+    post_to_mastodon(message)
+    post_to_twitter(message)
+
diff --git a/ttadmin/settings.py b/ttadmin/settings.py
index 205312b..b3c4091 100644
--- a/ttadmin/settings.py
+++ b/ttadmin/settings.py
@@ -103,3 +103,16 @@ STATIC_ROOT = 'static'
 
 MAILGUN_URL = "OVERWRITE THIS"
 MAILGUN_KEY = "OVERWRITE THIS"
+
+# Mastodon credentials
+MASTO_CLIENT_ID = "OVERWRITE THIS"
+MASTO_CLIENT_SECRET = "OVERWRITE THIS"
+MASTO_ACCESS_TOKEN = "OVERWRITE THIS"
+MASTO_BASE_URL = "https://tiny.tilde.website"
+
+# Twitter credentials
+TWITTER_CONSUMER_KEY = "OVERWRITE THIS"
+TWITTER_CONSUMER_SECRET = "OVERWRITE THIS"
+TWITTER_TOKEN = "OVERWRITE THIS"
+TWITTER_TOKEN_SECRET = "OVERWRITE THIS"
+
diff --git a/ttadmin/users/admin.py b/ttadmin/users/admin.py
index 29259b2..bcdeace 100644
--- a/ttadmin/users/admin.py
+++ b/ttadmin/users/admin.py
@@ -3,6 +3,7 @@ from django.contrib.auth.models import User
 from django.contrib.auth.models import Group
 
 from .models import Townie, Pubkey
+from common.social import post_users_to_social
 
 class PubkeyInline(admin.TabularInline):
     model = Pubkey
@@ -12,6 +13,7 @@ def bulk_review(madmin, req, qs):
     for townie in qs:
         townie.reviewed = True
         townie.save()
+    post_users_to_social(qs)
 
 bulk_review.short_description = 'mark selected townies as reviewed'