diff --git a/app/src/main/java/com/nextcloud/talk/contacts/ContactsActivity.kt b/app/src/main/java/com/nextcloud/talk/contacts/ContactsActivity.kt
index 65682dd61..b0031a27f 100644
--- a/app/src/main/java/com/nextcloud/talk/contacts/ContactsActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/contacts/ContactsActivity.kt
@@ -18,6 +18,7 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import autodagger.AutoInjector
 import com.nextcloud.talk.activities.BaseActivity
 import com.nextcloud.talk.application.NextcloudTalkApplication
+import com.nextcloud.talk.contacts.CompanionClass.Companion.KEY_HIDE_ALREADY_EXISTING_PARTICIPANTS
 import com.nextcloud.talk.extensions.getParcelableArrayListExtraProvider
 import com.nextcloud.talk.components.SetupSystemBars
 import com.nextcloud.talk.models.json.autocomplete.AutocompleteUser
@@ -38,7 +39,9 @@ class ContactsActivity : BaseActivity() {
         contactsViewModel = ViewModelProvider(this, viewModelFactory)[ContactsViewModel::class.java]
         setContent {
             val isAddParticipants = intent.getBooleanExtra(BundleKeys.KEY_ADD_PARTICIPANTS, false)
+            val hideAlreadyAddedParticipants = intent.getBooleanExtra(KEY_HIDE_ALREADY_EXISTING_PARTICIPANTS, false)
             contactsViewModel.updateIsAddParticipants(isAddParticipants)
+            contactsViewModel.hideAlreadyAddedParticipants(hideAlreadyAddedParticipants)
             if (isAddParticipants) {
                 contactsViewModel.updateShareTypes(
                     listOf(
@@ -75,5 +78,6 @@ class CompanionClass {
     companion object {
         internal val TAG = ContactsActivity::class.simpleName
         internal const val ROOM_TYPE_ONE_ONE = "1"
+        const val KEY_HIDE_ALREADY_EXISTING_PARTICIPANTS: String = "KEY_HIDE_ALREADY_EXISTING_PARTICIPANTS"
     }
 }
diff --git a/app/src/main/java/com/nextcloud/talk/contacts/ContactsViewModel.kt b/app/src/main/java/com/nextcloud/talk/contacts/ContactsViewModel.kt
index 18c4ea2b3..7d495226b 100644
--- a/app/src/main/java/com/nextcloud/talk/contacts/ContactsViewModel.kt
+++ b/app/src/main/java/com/nextcloud/talk/contacts/ContactsViewModel.kt
@@ -36,6 +36,8 @@ class ContactsViewModel @Inject constructor(
     private val _isAddParticipantsView = MutableStateFlow(false)
     val isAddParticipantsView: StateFlow<Boolean> = _isAddParticipantsView
 
+    private var hideAlreadyAddedParticipants: Boolean = false
+
     init {
         getContactsFromSearchParams()
     }
@@ -69,6 +71,10 @@ class ContactsViewModel @Inject constructor(
         _isAddParticipantsView.value = value
     }
 
+    fun hideAlreadyAddedParticipants(value: Boolean) {
+        hideAlreadyAddedParticipants = value
+    }
+
     @Suppress("Detekt.TooGenericExceptionCaught")
     fun getContactsFromSearchParams() {
         _contactsViewState.value = ContactsUiState.Loading
@@ -78,7 +84,12 @@ class ContactsViewModel @Inject constructor(
                     searchQuery.value,
                     shareTypeList
                 )
-                val contactsList: List<AutocompleteUser>? = contacts.ocs!!.data
+                val contactsList: MutableList<AutocompleteUser>? = contacts.ocs!!.data?.toMutableList()
+
+                if (hideAlreadyAddedParticipants) {
+                    contactsList?.removeAll(selectedParticipants.value)
+                }
+
                 _contactsViewState.value = ContactsUiState.Success(contactsList)
             } catch (exception: Exception) {
                 _contactsViewState.value = ContactsUiState.Error(exception.message ?: "")
diff --git a/app/src/main/java/com/nextcloud/talk/conversationinfo/ConversationInfoActivity.kt b/app/src/main/java/com/nextcloud/talk/conversationinfo/ConversationInfoActivity.kt
index 1c97e4efb..b4909ff6f 100644
--- a/app/src/main/java/com/nextcloud/talk/conversationinfo/ConversationInfoActivity.kt
+++ b/app/src/main/java/com/nextcloud/talk/conversationinfo/ConversationInfoActivity.kt
@@ -53,6 +53,7 @@ import com.nextcloud.talk.application.NextcloudTalkApplication
 import com.nextcloud.talk.bottomsheet.items.BasicListItemWithImage
 import com.nextcloud.talk.bottomsheet.items.listItemsWithImage
 import com.nextcloud.talk.chat.ChatActivity
+import com.nextcloud.talk.contacts.CompanionClass.Companion.KEY_HIDE_ALREADY_EXISTING_PARTICIPANTS
 import com.nextcloud.talk.contacts.ContactsActivity
 import com.nextcloud.talk.conversationinfo.viewmodel.ConversationInfoViewModel
 import com.nextcloud.talk.conversationinfoedit.ConversationInfoEditActivity
@@ -151,7 +152,6 @@ class ConversationInfoActivity :
                 data.putLong(BundleKeys.KEY_INTERNAL_USER_ID, conversationUser.id!!)
                 return data.build()
             }
-
             return null
         }
 
@@ -339,7 +339,7 @@ class ConversationInfoActivity :
     fun showOptionsMenu() {
         if (::optionsMenu.isInitialized) {
             optionsMenu.clear()
-            if (CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.AVATAR)) {
+            if (hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.AVATAR)) {
                 menuInflater.inflate(R.menu.menu_conversation_info, optionsMenu)
             }
         }
@@ -403,7 +403,7 @@ class ConversationInfoActivity :
     }
 
     private fun setupWebinaryView() {
-        if (CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.WEBINARY_LOBBY) &&
+        if (hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.WEBINARY_LOBBY) &&
             webinaryRoomType(conversation!!) &&
             ConversationUtils.canModerate(conversation!!, spreedCapabilities)
         ) {
@@ -682,16 +682,22 @@ class ConversationInfoActivity :
 
     private fun selectParticipantsToAdd() {
         val bundle = Bundle()
-        val existingParticipantsId = arrayListOf<String>()
+        val existingParticipants = ArrayList<AutocompleteUser>()
 
         for (userItem in userItems) {
             if (userItem.model.calculatedActorType == USERS) {
-                existingParticipantsId.add(userItem.model.calculatedActorId!!)
+                val user = AutocompleteUser(
+                    userItem.model.calculatedActorId!!,
+                    userItem.model.displayName,
+                    userItem.model.calculatedActorType.name.lowercase()
+                )
+                existingParticipants.add(user)
             }
         }
 
         bundle.putBoolean(BundleKeys.KEY_ADD_PARTICIPANTS, true)
-        bundle.putStringArrayList(BundleKeys.KEY_EXISTING_PARTICIPANTS, existingParticipantsId)
+        bundle.putParcelableArrayList("selectedParticipants", existingParticipants)
+        bundle.putBoolean(KEY_HIDE_ALREADY_EXISTING_PARTICIPANTS, true)
         bundle.putString(BundleKeys.KEY_TOKEN, conversation!!.token)
 
         val intent = Intent(this, ContactsActivity::class.java)
@@ -851,7 +857,7 @@ class ConversationInfoActivity :
 
         setUpNotificationSettings(databaseStorageModule!!)
 
-        if (CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.RICH_OBJECT_LIST_MEDIA) &&
+        if (hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.RICH_OBJECT_LIST_MEDIA) &&
             conversationCopy.remoteServer.isNullOrEmpty()
         ) {
             binding.sharedItemsButton.setOnClickListener { showSharedItems() }
@@ -861,7 +867,7 @@ class ConversationInfoActivity :
 
         if (ConversationUtils.canModerate(conversationCopy, spreedCapabilities)) {
             binding.addParticipantsAction.visibility = VISIBLE
-            if (CapabilitiesUtil.hasSpreedFeatureCapability(
+            if (hasSpreedFeatureCapability(
                     spreedCapabilities,
                     SpreedFeatures.CLEAR_HISTORY
                 ) && conversationCopy.canDeleteConversation
@@ -1093,7 +1099,7 @@ class ConversationInfoActivity :
 
     private fun initExpiringMessageOption() {
         if (ConversationUtils.isParticipantOwnerOrModerator(conversation!!) &&
-            CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.MESSAGE_EXPIRATION)
+            hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.MESSAGE_EXPIRATION)
         ) {
             databaseStorageModule?.setMessageExpiration(conversation!!.messageExpiration)
             val value = databaseStorageModule!!.getString("conversation_settings_dropdown", "")
@@ -1116,7 +1122,7 @@ class ConversationInfoActivity :
 
     private fun adjustNotificationLevelUI() {
         if (conversation != null) {
-            if (CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.NOTIFICATION_LEVELS)) {
+            if (hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.NOTIFICATION_LEVELS)) {
                 binding.notificationSettingsView.conversationInfoMessageNotificationsDropdown.isEnabled = true
                 binding.notificationSettingsView.conversationInfoMessageNotificationsDropdown.alpha = 1.0f
 
@@ -1151,7 +1157,7 @@ class ConversationInfoActivity :
 
     private fun setProperNotificationValue(conversation: ConversationModel?) {
         if (conversation!!.type == ConversationEnums.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL) {
-            if (CapabilitiesUtil.hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.MENTION_FLAG)) {
+            if (hasSpreedFeatureCapability(spreedCapabilities, SpreedFeatures.MENTION_FLAG)) {
                 binding.notificationSettingsView.conversationInfoMessageNotificationsDropdown.setText(
                     resources.getString(R.string.nc_notify_me_always)
                 )
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6483bc303..dcbfa5238 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -477,6 +477,7 @@ How to translate with transifex:
     <string name="nc_teams">Teams</string>
     <string name="nc_participants">Participants</string>
     <string name="nc_participants_add">Add participants</string>
+    <string name="nc_start_group_chat">Start group chat</string>
 
     <string name="nc_owner">Owner</string>
     <string name="nc_moderator">Moderator</string>
diff --git a/scripts/analysis/lint-results.txt b/scripts/analysis/lint-results.txt
index 26b9b13e0..beaf9459b 100644
--- a/scripts/analysis/lint-results.txt
+++ b/scripts/analysis/lint-results.txt
@@ -1,2 +1,2 @@
 DO NOT TOUCH; GENERATED BY DRONE
-      <span class="mdl-layout-title">Lint Report: 9 errors and 100 warnings</span>
+      <span class="mdl-layout-title">Lint Report: 9 errors and 98 warnings</span>