diff --git a/backend/src/main/java/ovh/herisson/Clyde/EndPoints/Msg/MessagesController.java b/backend/src/main/java/ovh/herisson/Clyde/EndPoints/Msg/MessagesController.java
index a40545f..8cee27c 100644
--- a/backend/src/main/java/ovh/herisson/Clyde/EndPoints/Msg/MessagesController.java
+++ b/backend/src/main/java/ovh/herisson/Clyde/EndPoints/Msg/MessagesController.java
@@ -1,5 +1,6 @@
 package ovh.herisson.Clyde.EndPoints.Msg;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.CrossOrigin;
@@ -13,9 +14,11 @@ import org.springframework.web.bind.annotation.RestController;
 
 import lombok.AllArgsConstructor;
 import ovh.herisson.Clyde.DTO.Msg.DiscussionDTO;
+import ovh.herisson.Clyde.Repositories.UserRepository;
 import ovh.herisson.Clyde.Repositories.Msg.DiscussionRepository;
 import ovh.herisson.Clyde.Responses.UnauthorizedResponse;
 import ovh.herisson.Clyde.Services.AuthenticatorService;
+import ovh.herisson.Clyde.Services.UserService;
 import ovh.herisson.Clyde.Services.Msg.DiscussionService;
 import ovh.herisson.Clyde.Tables.User;
 import ovh.herisson.Clyde.Tables.Msg.Discussion;
@@ -29,6 +32,7 @@ public class MessagesController {
 	private AuthenticatorService authServ;
 	private DiscussionService discServ;
 	private DiscussionRepository discRepo;
+	private UserService userServ;
 
 	@GetMapping("/discussions")
 	public ResponseEntity<Iterable<Discussion>> getDiscussions(@RequestHeader("Authorization") String token ){
@@ -60,6 +64,20 @@ public class MessagesController {
 		return new ResponseEntity<>(disc, HttpStatus.OK);
 	}
 
+	@PatchMapping("/discussion/{id}/add")
+	public ResponseEntity<Discussion> AlterDiscussion(@RequestHeader("Authorization") String token, @PathVariable long id, @RequestBody User data){
+		User user = authServ.getUserFromToken(token);
+		if(user == null){
+			return new UnauthorizedResponse<>(null);
+		}
+
+		Discussion disc = discRepo.findById(id).orElse(null);
+		User invited = userServ.getUserById(data.getRegNo());
+		disc.addMember(invited);
+		discRepo.save(disc);
+		return new ResponseEntity<>(disc, HttpStatus.OK);
+	}
+
 	@PostMapping("/discussion/{id}")
 	public ResponseEntity<Discussion> sendMessage(@RequestHeader("Authorization") String token, @PathVariable long id, @RequestBody Message msg){
 		User user = authServ.getUserFromToken(token);
diff --git a/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Discussion.java b/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Discussion.java
index 028bb4f..e98bd1e 100644
--- a/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Discussion.java
+++ b/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Discussion.java
@@ -51,4 +51,8 @@ public class Discussion{
 		msg.setDiscussion(this);
 		msgs.add(msg);
 	}
+
+    public void addMember(User user) {
+		members.add(user);
+    }
 }
diff --git a/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Message.java b/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Message.java
index a06e2b3..ea1f473 100644
--- a/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Message.java
+++ b/backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Message.java
@@ -2,11 +2,13 @@ package ovh.herisson.Clyde.Tables.Msg;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.OneToOne;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -26,7 +28,7 @@ public class Message {
 	private long id;
 	private String content; 
 
-	@OneToOne
+	@ManyToOne
 	private User author;
 
 	public User getAuthor() {
diff --git a/backend/src/main/java/ovh/herisson/Clyde/Tables/User.java b/backend/src/main/java/ovh/herisson/Clyde/Tables/User.java
index 300a58c..2badd32 100644
--- a/backend/src/main/java/ovh/herisson/Clyde/Tables/User.java
+++ b/backend/src/main/java/ovh/herisson/Clyde/Tables/User.java
@@ -2,6 +2,7 @@ package ovh.herisson.Clyde.Tables;
 
 import jakarta.persistence.*;
 import ovh.herisson.Clyde.Tables.Msg.Discussion;
+import ovh.herisson.Clyde.Tables.Msg.Message;
 
 import java.util.Date;
 import java.util.List;
@@ -24,6 +25,11 @@ public class User {
     private ovh.herisson.Clyde.Tables.Role role;
     private String password;
 
+	////// Extension Messagerie /////
+	@OneToMany(mappedBy = "author", cascade = CascadeType.ALL)
+	private List<Message> msgs;
+	/////////////////////////////////
+
 	@ManyToMany( mappedBy = "members" )
 	private List<Discussion> discussions;
 
diff --git a/frontend/src/Apps/Msg.vue b/frontend/src/Apps/Msg.vue
index 92c9c49..b74f980 100644
--- a/frontend/src/Apps/Msg.vue
+++ b/frontend/src/Apps/Msg.vue
@@ -7,9 +7,10 @@
 
 <script setup>
 	import { ref, reactive } from 'vue'
-	import { discussionsList, currentDiscussion, fetchDiscussion, createDiscussion, sendMessage, updateDiscussionName} from '@/rest/msg.js'
+	import { discussionsList, currentDiscussion, fetchDiscussion, createDiscussion, sendMessage, updateDiscussionName, invite} from '@/rest/msg.js'
 
 	const msgContent = ref("");
+	const addMember = ref(false);
 
 </script>
 
@@ -19,8 +20,8 @@
 			<div @click="fetchDiscussion(discussion.id)" class="discItem" v-for="discussion in discussionsList" :key="discussion.id">{{ discussion.name }}</div>
 			<button id="createDiscussion" @click="createDiscussion('New Discussion')">+</button>
 		</div>
-		<div id="discussion">
-			<h1 id=msgName ><input class="InputTitle" type="text" @blur="updateDiscussionName(currentDiscussion.id, currentDiscussion.name)" v-model="currentDiscussion.name"></h1>
+		<div id="discussion" v-if="currentDiscussion.length != 0">
+			<h1 id=msgName ><input class="InputTitle" type="text" @change="updateDiscussionName(currentDiscussion.id, currentDiscussion.name)" v-model="currentDiscussion.name"></h1>
 			<div id=msgs>
 				<div class="msg" v-for="msg in currentDiscussion.msgs" :sender="msg.sender" :key="msg.id">
 					{{ msg.content }}
@@ -31,6 +32,10 @@
 				<input type="submit" @click="sendMessage(currentDiscussion.id, msgContent, null)" value="send">
 			</div>
 		</div>
+		<div id="members" v-if="currentDiscussion.length != 0">
+			<div class="memberItem" v-for="member in currentDiscussion.members" :key="member.id">{{ member.firstName }} {{ member.lastName.toUpperCase() }}</div>
+			<input type=text id="addMembers" @focus="addMember = true" @blur="addMember = false;$event.target.value = ''" @change="invite(currentDiscussion.id, $event.target.value)" :placeholder="addMember ? 'Regno' : '+'"/>
+		</div>
 	</div>
 </template>
 
@@ -42,7 +47,7 @@ div#msg{
 	height: 100%;
 
 	display: grid;
-	grid-template-columns: 20% auto;
+	grid-template-columns: 20% auto 10%;
 }
 
 div#discList{
@@ -53,7 +58,17 @@ div#discList{
 	padding: 10px;
 	display: flex;
 	flex-direction: column;
+}
 
+div#members{
+	margin: 30px 0;
+	border-radius: 10px 0 0 10px;
+	background-color: red;
+	background-color: rgba(255, 255, 255, 0.05);
+	overflow: hidden;
+	display: flex;
+	padding: 10px 0 0 10px;
+	flex-direction: column;
 }
 
 .InputTitle{
@@ -74,6 +89,19 @@ div#discList{
 	border: 1px solid darkorange;
 }
 
+.memberItem{
+	color: darkorange;
+	display: flex;
+	font-family: sans-serif;
+	font-weight: bold;
+	height: 4vh;
+	margin: 5px;
+	border-radius: 30px 0 0 30px;
+	align-items: center;
+	justify-content: center;
+	border: 1px solid darkorange;
+}
+
 #createDiscussion{
 	height: 4vh;
 	margin: 5px;
@@ -84,6 +112,17 @@ div#discList{
 	font-weight: 900;
 	font-size: 2em;
 }
+#addMembers{
+	height: 4vh;
+	margin: 5px;
+	text-align: center;
+	color: white;
+	background-color: green;
+	border-radius: 30px 0 0 30px;
+	border: none;
+	font-weight: 900;
+	font-size: 2em;
+}
 
 div#discussion{
 	display: flex;
diff --git a/frontend/src/rest/msg.js b/frontend/src/rest/msg.js
index d1a9521..a27161b 100644
--- a/frontend/src/rest/msg.js
+++ b/frontend/src/rest/msg.js
@@ -13,8 +13,8 @@ import { ref } from 'vue'
  * - name
  * - members
  */
-export const discussionsList = ref({});
-export const currentDiscussion = ref({});
+export const discussionsList = ref();
+export const currentDiscussion = ref([]);
 
 
 export async function createDiscussion(name){
@@ -24,7 +24,7 @@ export async function createDiscussion(name){
 
 
 export async function invite(id, regNo){
-	restPost("/discussion/"+ id+ "/invite", {user: regNo});
+	restPatch("/discussion/"+ id+ "/add", {regNo: parseInt(regNo)}).then(() => fetchDiscussion(id))
 }
 
 export async function sendMessage(id, content, responseId){