diff --git a/src/main/java/envoy/client/EnvoyClient.java b/src/main/java/envoy/client/EnvoyClient.java
index c659c4e..7bef3e5 100644
--- a/src/main/java/envoy/client/EnvoyClient.java
+++ b/src/main/java/envoy/client/EnvoyClient.java
@@ -17,14 +17,19 @@ import javax.xml.datatype.DatatypeConfigurationException;
 import javax.xml.datatype.DatatypeFactory;
 
 import envoy.schema.Message;
+import envoy.schema.Message.MetaData.MessageState;
 import envoy.schema.Messages;
 import envoy.schema.ObjectFactory;
+import envoy.schema.Users;
 
 /**
  * Project: <strong>envoy-client</strong><br>
  * File: <strong>EnvoyClient.java</strong><br>
  * Created: <strong>28 Sep 2019</strong><br>
- * Author: <strong>Kai S. K. Engelbart &amp; Maximilian K&aumlfer</strong>
+ * 
+ * @author Kai S. K. Engelbart
+ * @author Maximilian K&auml;fer
+ * @since Envoy 0.1
  */
 
 public class EnvoyClient {
@@ -82,6 +87,7 @@ public class EnvoyClient {
 			WebTarget	target		= client.target(String.format("%s:%s/envoy-server/rest/message/send",
 					serverProps.getProperty("server"),
 					serverProps.getProperty("port")));
+			
 			Response	response	= target.request().post(Entity.entity(messages, "application/xml"));
 			System.out.println("Response code: " + response.getStatus());
 			response.close();
@@ -97,11 +103,11 @@ public class EnvoyClient {
 	 * @param textContent The content (text) of the message
 	 * @return Prepared {@link Message} object
 	 */
-	public Message createMessage(String senderID, String recipientID, String textContent) {
+	public Message createMessage(long senderID, long recipientID, String textContent) {
 		Message.MetaData metaData = objectFactory.createMessageMetaData();
 		metaData.setSender(senderID);
 		metaData.setRecipient(recipientID);
-		metaData.setState(false);
+		metaData.setState(MessageState.WAITING);
 		metaData.setDate(datatypeFactory.newXMLGregorianCalendar(Instant.now().toString()));
 
 		Message.Content content = objectFactory.createMessageContent();
@@ -120,4 +126,17 @@ public class EnvoyClient {
 		wrapper.getMessage().addAll(Arrays.asList(messages));
 		return wrapper;
 	}
+	
+	public Users getUsersListXml() {
+		Client		client		= ClientBuilder.newClient();
+		WebTarget	target		= client.target(String.format("%s:%s/envoy-server/rest/user",
+				serverProps.getProperty("server"),
+				serverProps.getProperty("port")));
+		Response	response	= target.request("application/xml").get();
+		Users		users		= response.readEntity(Users.class);
+		System.out.println("Response code: " + response.getStatus());
+		response.close();
+		client.close();
+		return users;
+	}
 }
\ No newline at end of file
diff --git a/src/main/java/envoy/client/ui/ChatWindow.java b/src/main/java/envoy/client/ui/ChatWindow.java
index 8fb801e..178c738 100644
--- a/src/main/java/envoy/client/ui/ChatWindow.java
+++ b/src/main/java/envoy/client/ui/ChatWindow.java
@@ -7,6 +7,7 @@ import java.awt.Font;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
 import java.awt.Insets;
+import java.io.IOException;
 
 import javax.swing.DefaultListModel;
 import javax.swing.JButton;
@@ -16,25 +17,37 @@ import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTextArea;
+import javax.swing.ListSelectionModel;
+import javax.swing.SwingUtilities;
 import javax.swing.border.EmptyBorder;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.apache.http.client.ClientProtocolException;
+import org.xml.sax.SAXException;
 
 import envoy.client.EnvoyClient;
 import envoy.schema.Message;
+import envoy.schema.User;
+import envoy.schema.Users;
 
 /**
  * Project: <strong>envoy-client</strong><br>
  * File: <strong>ChatWindow.java</strong><br>
  * Created: <strong>28 Sep 2019</strong><br>
- * Author: <strong>Maximilian K&aumlfer &amp; Kai S. K. Engelbart</strong>
+ * 
+ * @author Kai S. K. Engelbart
+ * @author Maximilian K&auml;fer
+ * @since Envoy 0.1
  */
 public class ChatWindow extends JFrame {
 
 	private static final long serialVersionUID = 6865098428255463649L;
 
+	private long		recipientID	= 0;
 	private JPanel		contentPane	= new JPanel();
 	private EnvoyClient	envoyClient	= new EnvoyClient();
 
-	public DefaultListModel<String> listModel = new DefaultListModel<>();
+	private DefaultListModel<String> messageListModel = new DefaultListModel<>();
 
 	public ChatWindow() {
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
@@ -62,7 +75,7 @@ public class ChatWindow extends JFrame {
 		elementList.setForeground(new Color(255, 255, 255));
 		elementList.setBackground(new Color(51, 51, 51));
 
-		elementList.setModel(listModel);
+		elementList.setModel(messageListModel);
 		elementList.setFont(new Font("Arial", Font.PLAIN, 17));
 		elementList.setFixedCellHeight(60);
 		elementList.setBorder(new EmptyBorder(5, 5, 5, 5));
@@ -119,8 +132,11 @@ public class ChatWindow extends JFrame {
 		contentPane.add(postButton, gbc_moveSelectionPostButton);
 
 		postButton.addActionListener((evt) -> {
-			if (!messageEnterTextfield.getText().isEmpty()) try {
-				final Message message = envoyClient.createMessage("Kai", "Maxi", messageEnterTextfield.getText());
+			if (recipientID == 0) System.out.println("Please select recipient");
+
+			// TODO: Acquire proper sender id
+			if (!messageEnterTextfield.getText().isEmpty() && recipientID != 0) try {
+				final Message message = envoyClient.createMessage(1, recipientID, messageEnterTextfield.getText());
 				envoyClient.sendMessage(message);
 				appendMessageToChat(message);
 				messageEnterTextfield.setText("");
@@ -132,6 +148,50 @@ public class ChatWindow extends JFrame {
 				e.printStackTrace();
 			}
 		});
+
+		JList<User> userList = new JList<>();
+		userList.setCellRenderer(new UserListRenderer());
+		userList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
+		userList.addListSelectionListener((listSelectionEvent) -> {
+			if (!listSelectionEvent.getValueIsAdjusting()) {
+				@SuppressWarnings("unchecked")
+				JList<User> selectedUserList = (JList<User>) listSelectionEvent.getSource();
+				recipientID = selectedUserList.getModel().getElementAt(selectedUserList.getSelectedIndex()).getID();
+			}
+		});
+
+		userList.setSelectionForeground(new Color(255, 255, 255));
+		userList.setSelectionBackground(new Color(102, 0, 153));
+		userList.setForeground(new Color(255, 255, 255));
+		userList.setBackground(new Color(51, 51, 51));
+		userList.setFont(new Font("Arial", Font.PLAIN, 17));
+		userList.setBorder(new EmptyBorder(5, 5, 5, 5));
+
+		GridBagConstraints gbc_userList = new GridBagConstraints();
+		gbc_userList.gridx	= 0;
+		gbc_userList.gridy	= 1;
+		gbc_userList.anchor	= GridBagConstraints.PAGE_START;
+		gbc_userList.insets	= new Insets(10, 0, 10, 0);
+
+		contentPane.add(userList, gbc_userList);
+		contentPane.revalidate();
+
+		loadUserList(userList);
+	}
+
+	/**
+	 * Initializes the elements of the user list by downloading them from the
+	 * server.
+	 * 
+	 * @param userList The {@link JList} to put the elements in
+	 */
+	private void loadUserList(JList<User> userList) {
+		new Thread(() -> {
+			Users					users			= envoyClient.getUsersListXml();
+			DefaultListModel<User>	userListModel	= new DefaultListModel<>();
+			users.getUser().forEach(user -> userListModel.addElement(user));
+			SwingUtilities.invokeLater(() -> userList.setModel(userListModel));
+		}).start();
 	}
 
 	/**
@@ -140,9 +200,7 @@ public class ChatWindow extends JFrame {
 	 * @param message The message from which to return the text content
 	 * @return The first content of type 'text'
 	 */
-	public String getFirstTextContent(Message message) {
-		return message.getContent().get(0).getText();
-	}
+	private String getFirstTextContent(Message message) { return message.getContent().get(0).getText(); }
 
 	/**
 	 * Appends a message with sender and message content to the message list.
@@ -150,12 +208,13 @@ public class ChatWindow extends JFrame {
 	 * @param message The message to append
 	 */
 	private void appendMessageToChat(Message message) {
-		listModel.addElement("<html>" + "<p style=\"color:#d2d235\"> <b> <small>" + message.getMetaData().getSender()
-				+ "</b> </small>" + "<br>" + "<p style=\"color:white\">" + getFirstTextContent(message)
-				+ "</span></html>");
+		messageListModel.addElement("<html>" + "<p style=\"color:#d2d235\"> <b> <small>"
+				+ message.getMetaData().getSender() + "</b> </small>" + "<br>" + "<p style=\"color:white\">"
+				+ getFirstTextContent(message) + "</span></html>");
 	}
 
-	public static void main(String[] args) {
+	public static void main(String[] args)
+			throws ClientProtocolException, IOException, SAXException, ParserConfigurationException {
 		EventQueue.invokeLater(() -> {
 			try {
 				ChatWindow frame = new ChatWindow();
diff --git a/src/main/java/envoy/client/ui/UserListRenderer.java b/src/main/java/envoy/client/ui/UserListRenderer.java
new file mode 100644
index 0000000..3c62e48
--- /dev/null
+++ b/src/main/java/envoy/client/ui/UserListRenderer.java
@@ -0,0 +1,41 @@
+package envoy.client.ui;
+
+import java.awt.Component;
+
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.ListCellRenderer;
+
+import envoy.schema.User;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>UserListRenderer.java</strong><br>
+ * Created: <strong>12 Oct 2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ */
+public class UserListRenderer extends JLabel implements ListCellRenderer<User> {
+
+	private static final long serialVersionUID = 5164417379767181198L;
+
+	@Override
+	public Component getListCellRendererComponent(JList<? extends User> list, User value, int index, boolean isSelected,
+			boolean cellHasFocus) {
+		if (isSelected) {
+			setBackground(list.getSelectionBackground());
+			setForeground(list.getSelectionForeground());
+		} else {
+			setBackground(list.getBackground());
+			setForeground(list.getForeground());
+		}
+
+		// Enable background rendering
+		setOpaque(true);
+
+		setText(value.getName());
+		setFont(list.getFont());
+
+		return this;
+	}
+}