diff --git a/addons/mail/models/mail_channel.py b/addons/mail/models/mail_channel.py
index 2b060cf1276..778ee09d4c4 100644
--- a/addons/mail/models/mail_channel.py
+++ b/addons/mail/models/mail_channel.py
@@ -537,10 +537,13 @@ class Channel(models.Model):
             :rtype : list(dict)
         """
         channel_infos = []
-        partner_channels = self.env['mail.channel.partner']
-        # find the channel partner state, if logged user
-        if self.env.user and self.env.user.partner_id:
-            partner_channels = self.env['mail.channel.partner'].search([('partner_id', '=', self.env.user.partner_id.id), ('channel_id', 'in', self.ids)])
+
+        # all relations partner_channel on those channels
+        all_partner_channel = self.env['mail.channel.partner'].search([('channel_id', 'in', self.ids)])
+
+        # all partner infos on those channels
+        partner_infos = all_partner_channel.mapped('partner_id').read(['id', 'name', 'email'])
+
         # for each channel, build the information header and include the logged partner information
         for channel in self:
             info = {
@@ -573,17 +576,28 @@ class Channel(models.Model):
                 if last_message:
                     info['last_message'] = last_message[0].get('last_message')
 
-            # add user session state, if available and if user is logged
-            if partner_channels.ids:
-                partner_channel = partner_channels.filtered(lambda c: channel.id == c.channel_id.id)
-                if len(partner_channel) >= 1:
-                    partner_channel = partner_channel[0]
-                    info['state'] = partner_channel.fold_state or 'open'
-                    info['is_minimized'] = partner_channel.is_minimized
-                    info['seen_message_id'] = partner_channel.seen_message_id.id
+            # listeners of the channel
+            channel_partners = all_partner_channel.filtered(lambda pc: channel.id == pc.channel_id.id)
+
+            # find the channel partner state, if logged user
+            partner_channel = self.env['mail.channel.partner']
+            if self.env.user and self.env.user.partner_id:
+                partner_channel = channel_partners.filtered(lambda pc: pc.partner_id.id == self.env.user.partner_id.id)
                 # add needaction and unread counter, since the user is logged
                 info['message_needaction_counter'] = channel.message_needaction_counter
                 info['message_unread_counter'] = channel.message_unread_counter
+
+            # add user session state, if available and if user is logged
+            if len(partner_channel.ids):
+                partner_channel = partner_channel[0]
+                info['state'] = partner_channel.fold_state or 'open'
+                info['is_minimized'] = partner_channel.is_minimized
+                info['seen_message_id'] = partner_channel.seen_message_id.id
+
+            # add members infos
+            partner_ids = channel_partners.mapped('partner_id').ids
+            info['members'] = [partner_info for partner_info in partner_infos if partner_info['id'] in partner_ids]
+
             channel_infos.append(info)
         return channel_infos
 
diff --git a/addons/mail/static/src/js/models/threads/channel.js b/addons/mail/static/src/js/models/threads/channel.js
index ff90ca8edfb..f6839873ef7 100644
--- a/addons/mail/static/src/js/models/threads/channel.js
+++ b/addons/mail/static/src/js/models/threads/channel.js
@@ -29,6 +29,10 @@ var Channel = SearchableThread.extend(ThreadTypingMixin, {
      * @param  {boolean} params.data.is_moderator whether the current user is
      *   moderator of this channel.
      * @param {string} [params.data.last_message_date] date in server-format
+     * @param {Object[]} [params.data.members=[]]
+     * @param {integer} [params.data.members[i].id]
+     * @param {string} [params.data.members[i].name]
+     * @param {string} [params.data.members[i].email]
      * @param {integer} [params.data.message_unread_counter]
      * @param {boolean} [params.data.moderation=false] whether the channel is
      *   moderated or not
@@ -61,7 +65,7 @@ var Channel = SearchableThread.extend(ThreadTypingMixin, {
         this._isModerated = data.moderation;
         this._isMyselfModerator = data.is_moderator;
         this._lastMessageDate = undefined;
-        this._members = [];
+        this._members = data.members || [];
         // Deferred that is resolved on fetched members of this channel.
         this._membersDef = undefined;
         // number of messages that are 'needaction', which is equivalent to the