diff --git a/src/GroupAddressPicker.js b/src/GroupAddressPicker.js
index 0b039074f0..595f0cfe46 100644
--- a/src/GroupAddressPicker.js
+++ b/src/GroupAddressPicker.js
@@ -96,13 +96,6 @@ function _onGroupInviteFinished(groupId, addrs) {
                 title: _t("Failed to invite the following users to %(groupId)s:", {groupId: groupId}),
                 description: errorList.join(", "),
             });
-        } else {
-            const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
-            Modal.createTrackedDialog('Group invitations sent', '', QuestionDialog, {
-                title: _t("Invites sent"),
-                description: _t("Your community invitations have been sent."),
-                hasCancelButton: false,
-            });
         }
     }).catch((err) => {
         const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
diff --git a/src/components/views/groups/GroupMemberList.js b/src/components/views/groups/GroupMemberList.js
index 899543238c..511af37166 100644
--- a/src/components/views/groups/GroupMemberList.js
+++ b/src/components/views/groups/GroupMemberList.js
@@ -17,7 +17,7 @@ limitations under the License.
 import React from 'react';
 import { _t } from '../../../languageHandler';
 import sdk from '../../../index';
-import { groupMemberFromApiObject } from '../../../groups';
+import GroupStoreCache from '../../../stores/GroupStoreCache';
 import GeminiScrollbar from 'react-gemini-scrollbar';
 import PropTypes from 'prop-types';
 import withMatrixClient from '../../../wrappers/withMatrixClient';
@@ -27,15 +27,16 @@ const INITIAL_LOAD_NUM_MEMBERS = 30;
 export default withMatrixClient(React.createClass({
     displayName: 'GroupMemberList',
 
-    propTypes: {
+    contextTypes: {
         matrixClient: PropTypes.object.isRequired,
+    },
+
+    propTypes: {
         groupId: PropTypes.string.isRequired,
     },
 
     getInitialState: function() {
         return {
-            fetching: false,
-            fetchingInvitedMembers: false,
             members: null,
             invitedMembers: null,
             truncateAt: INITIAL_LOAD_NUM_MEMBERS,
@@ -44,36 +45,23 @@ export default withMatrixClient(React.createClass({
 
     componentWillMount: function() {
         this._unmounted = false;
-        this._fetchMembers();
+        this._initGroupStore(this.props.groupId);
+    },
+
+    _initGroupStore: function(groupId) {
+        this._groupStore = GroupStoreCache.getGroupStore(this.context.matrixClient, groupId);
+        this._groupStore.on('update', () => {
+            this._fetchMembers();
+        });
+        this._groupStore.on('error', (err) => {
+            console.error(err);
+        });
     },
 
     _fetchMembers: function() {
         this.setState({
-            fetching: true,
-            fetchingInvitedMembers: true,
-        });
-        this.props.matrixClient.getGroupUsers(this.props.groupId).then((result) => {
-            this.setState({
-                members: result.chunk.map((apiMember) => {
-                    return groupMemberFromApiObject(apiMember);
-                }),
-                fetching: false,
-            });
-        }).catch((e) => {
-            this.setState({fetching: false});
-            console.error("Failed to get group member list: " + e);
-        });
-
-        this.props.matrixClient.getGroupInvitedUsers(this.props.groupId).then((result) => {
-            this.setState({
-                invitedMembers: result.chunk.map((apiMember) => {
-                    return groupMemberFromApiObject(apiMember);
-                }),
-                fetchingInvitedMembers: false,
-            });
-        }).catch((e) => {
-            this.setState({fetchingInvitedMembers: false});
-            console.error("Failed to get group invited member list: " + e);
+            members: this._groupStore.getGroupMembers(),
+            invitedMembers: this._groupStore.getGroupInvitedMembers(),
         });
     },
 
diff --git a/src/components/views/groups/GroupRoomList.js b/src/components/views/groups/GroupRoomList.js
index 5dd4de110e..3fcfedd486 100644
--- a/src/components/views/groups/GroupRoomList.js
+++ b/src/components/views/groups/GroupRoomList.js
@@ -16,7 +16,6 @@ limitations under the License.
 import React from 'react';
 import { _t } from '../../../languageHandler';
 import sdk from '../../../index';
-import { groupRoomFromApiObject } from '../../../groups';
 import GroupStoreCache from '../../../stores/GroupStoreCache';
 import GeminiScrollbar from 'react-gemini-scrollbar';
 import PropTypes from 'prop-types';
@@ -63,9 +62,7 @@ export default React.createClass({
     _fetchRooms: function() {
         if (this._unmounted) return;
         this.setState({
-            rooms: this._groupStore.getGroupRooms().map((apiRoom) => {
-                return groupRoomFromApiObject(apiRoom);
-            }),
+            rooms: this._groupStore.getGroupRooms(),
         });
     },
 
diff --git a/src/stores/GroupStore.js b/src/stores/GroupStore.js
index da27bd10e8..1da1c35a2b 100644
--- a/src/stores/GroupStore.js
+++ b/src/stores/GroupStore.js
@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 import EventEmitter from 'events';
+import { groupMemberFromApiObject, groupRoomFromApiObject } from '../groups';
 import FlairStore from './FlairStore';
 
 /**
@@ -30,6 +31,29 @@ export default class GroupStore extends EventEmitter {
         this._rooms = [];
         this._fetchSummary();
         this._fetchRooms();
+        this._fetchMembers();
+    }
+
+    _fetchMembers() {
+        this._matrixClient.getGroupUsers(this.groupId).then((result) => {
+            this._members = result.chunk.map((apiMember) => {
+                return groupMemberFromApiObject(apiMember);
+            });
+            this._notifyListeners();
+        }).catch((err) => {
+            console.error("Failed to get group member list: " + err);
+            this.emit('error', err);
+        });
+
+        this._matrixClient.getGroupInvitedUsers(this.groupId).then((result) => {
+            this._invitedMembers = result.chunk.map((apiMember) => {
+                return groupMemberFromApiObject(apiMember);
+            });
+            this._notifyListeners();
+        }).catch((err) => {
+            console.error("Failed to get group invited member list: " + err);
+            this.emit('error', err);
+        });
     }
 
     _fetchSummary() {
@@ -43,7 +67,9 @@ export default class GroupStore extends EventEmitter {
 
     _fetchRooms() {
         this._matrixClient.getGroupRooms(this.groupId).then((resp) => {
-            this._rooms = resp.chunk;
+            this._rooms = resp.chunk.map((apiRoom) => {
+                return groupRoomFromApiObject(apiRoom);
+            });
             this._notifyListeners();
         }).catch((err) => {
             this.emit('error', err);
@@ -62,6 +88,14 @@ export default class GroupStore extends EventEmitter {
         return this._rooms;
     }
 
+    getGroupMembers( ) {
+        return this._members;
+    }
+
+    getGroupInvitedMembers( ) {
+        return this._invitedMembers;
+    }
+
     getGroupPublicity() {
         return this._summary.user ? this._summary.user.is_publicised : null;
     }
@@ -84,6 +118,11 @@ export default class GroupStore extends EventEmitter {
             .then(this._fetchRooms.bind(this));
     }
 
+    inviteUserToGroup(userId) {
+        return this._matrixClient.inviteUserToGroup(this.groupId, userId)
+            .then(this._fetchMembers.bind(this));
+    }
+
     addRoomToGroupSummary(roomId, categoryId) {
         return this._matrixClient
             .addRoomToGroupSummary(this.groupId, roomId, categoryId)
diff --git a/src/utils/MultiInviter.js b/src/utils/MultiInviter.js
index e090f3d9e2..02c413ac83 100644
--- a/src/utils/MultiInviter.js
+++ b/src/utils/MultiInviter.js
@@ -18,6 +18,7 @@ limitations under the License.
 import MatrixClientPeg from '../MatrixClientPeg';
 import {getAddressType} from '../UserAddress';
 import {inviteToRoom} from '../RoomInvite';
+import GroupStoreCache from '../stores/GroupStoreCache';
 import Promise from 'bluebird';
 
 /**
@@ -117,7 +118,9 @@ export default class MultiInviter {
 
         let doInvite;
         if (this.groupId !== null) {
-            doInvite = MatrixClientPeg.get().inviteUserToGroup(this.groupId, addr);
+            doInvite = GroupStoreCache
+                .getGroupStore(MatrixClientPeg.get(), this.groupId)
+                .inviteUserToGroup(addr);
         } else {
             doInvite = inviteToRoom(this.roomId, addr);
         }