diff --git a/lumi2/static/js/group_create.js b/lumi2/static/js/group_create.js
new file mode 100644
index 0000000..6c0e846
--- /dev/null
+++ b/lumi2/static/js/group_create.js
@@ -0,0 +1,164 @@
+class UserEntry {
+    constructor(username, isMember, rowElement) {
+        this.username = username;
+        this.isMember = isMember;
+        this.rowElement = rowElement;
+        this.buttonElement = $(rowElement).find(".toggleMembershipButton");
+        if (isMember) {
+            $(this.buttonElement).click(() => this.onClickLeave());
+        } else {
+            $(this.buttonElement).click(() => this.onClickJoin());
+        }
+    }
+
+    onClickLeave() {
+        this.isMember = false;
+        $(this.buttonElement).off("click");
+        $(this.buttonElement).click(() => this.onClickJoin());
+        $(this.rowElement).prependTo($("#tableNonMembers").find("tbody"));
+        this.setButtonAppearanceJoinGroup();
+        if (membersTableIsEmpty()) {
+            showEmptyTableNotice();
+        }
+        disableCreateGroupButton();
+    }
+
+    onClickJoin() {
+        this.isMember = true;
+        $(this.buttonElement).off("click");
+        $(this.buttonElement).click(() => this.onClickLeave());
+        $(this.rowElement).prependTo($("#tableMembers").find("tbody"));
+        this.setButtonAppearanceLeaveGroup();
+        hideEmptyTableNotice();
+        enableCreateGroupButton();
+    }
+
+    setButtonAppearanceLeaveGroup() {
+        this.buttonElement.removeClass("btn-danger btn-success btn-secondary");
+        this.buttonElement.addClass("btn-danger");
+        this.buttonElement.empty();
+        this.buttonElement.html(
+            '<i class="bi-person-fill-x"></i> Cancel'
+        );
+    }
+
+    setButtonAppearanceJoinGroup() {
+        this.buttonElement.removeClass("btn-danger btn-success btn-secondary");
+        this.buttonElement.addClass("btn-success");
+        this.buttonElement.empty();
+        this.buttonElement.html(
+            '<i class="bi-person-fill-add"></i> Add'
+        );
+    }
+}
+
+function showErrorMessage(message) {
+    $("nav").after([
+    '<div class="alert alert-danger alert-dismissible" role="alert">',
+        `<div>${message}</div>`,
+        '<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>',
+    '</div>'
+    ].join(''));
+}
+
+function getGroupMembers() {
+    let groupMembers = [];
+    for (entry of $(membersTable).find(".userEntry")) {
+        groupMembers.push(entry.id);
+    }
+    return groupMembers;
+}
+
+function getGroupName() {
+    return $(groupNameInput).val();
+}
+
+function getUserEntries() {
+    let userEntries = [];
+    for (let entry of nonMembersTable.find("tbody").find(".userEntry")) {
+        userEntries.push(new UserEntry(
+            entry.id,
+            false,
+            entry
+        ));
+    }
+
+    return userEntries;
+}
+
+function membersTableIsEmpty() {
+    return $(membersTable).find("tbody").find(".userEntry").length === 0
+}
+
+function hideEmptyTableNotice() {
+    if (emptyTableNotice.parent().length != 0) {
+        emptyTableNotice.remove();
+    }
+}
+
+function showEmptyTableNotice() {
+    if (emptyTableNotice.parent().length == 0) {
+        $(membersTable).find("tbody").append($(emptyTableNotice));
+    }
+}
+
+function disableCreateGroupButton() {
+    if ($(groupNameInput).val().length == 0 || membersTableIsEmpty()) {
+        createGroupButton[0].disabled = true;
+    }
+}
+
+function enableCreateGroupButton() {
+    if ($(groupNameInput).val().length > 0 && !membersTableIsEmpty()) {
+        createGroupButton[0].disabled = false;
+    }
+}
+
+function createGroupButtonOnClick() {
+    $.ajax({
+        url: `/api/group/${getGroupName()}`,
+        type: "POST",
+        contentType: 'application/json',
+        data: JSON.stringify({
+            "members": getGroupMembers()
+        }),
+        dataType: "json",
+    }).done(function() {
+        window.location.replace(window.location.origin + `/groups/update/${getGroupName()}`);
+    }).fail(function(xhr, status, errorThrown) {
+        console.log(`Error: ${errorThrown}`);
+        console.log(`Status: ${status}`);
+        displayTextInputError(xhr.responseJSON['message']);
+    });
+}
+
+function displayTextInputError(message) {
+    $(createGroupButton).after([
+    '<div class="alert alert-danger alert-dismissible m-2" role="alert">',
+        `<div>${message}</div>`,
+        '<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>',
+    '</div>'
+    ].join(''));
+}
+
+let nonMembersTable = undefined;
+let membersTable = undefined;
+let entries = undefined;
+let emptyTableNotice = undefined;
+let createGroupButton = undefined;
+let groupNameInput = undefined;
+
+$(document).ready(function() {
+    nonMembersTable = $("#tableNonMembers");
+    membersTable = $("#tableMembers");
+    entries = getUserEntries();
+    emptyTableNotice = $("#emptyTableNotice");
+    createGroupButton = $("#createGroupButton");
+    groupNameInput = $("#groupNameInput");
+    disableCreateGroupButton();
+    $(groupNameInput).on("input", function() {
+        enableCreateGroupButton();
+        disableCreateGroupButton();
+    });
+    createGroupButton.click(createGroupButtonOnClick);
+});
diff --git a/lumi2/templates/usermanager/group_create.html b/lumi2/templates/usermanager/group_create.html
new file mode 100644
index 0000000..f3d4cce
--- /dev/null
+++ b/lumi2/templates/usermanager/group_create.html
@@ -0,0 +1,63 @@
+{% extends 'base.html' %}
+
+{% block content %}
+<div class="row">
+    <div class="col text-center">
+        <h1>Create a new Group</h1>
+    </div>
+</div>
+<div class="row align-items-center border rounded m-2">
+    <label for="groupNameInput" class="col-sm-2 col-form-label text-end m-2">Group Name</label>
+    <input type="text" class="col-sm form-control m-2" id="groupNameInput">
+    <a class="col-sm-2 btn btn-secondary m-2" href="{{ url_for('usermanager.group_list') }}" role="button">Cancel</a>
+    <button class="col-sm-2 btn btn-primary m-2" type="button" id="createGroupButton">Create Group</button>
+    <p class="col-sm-12 text-danger">
+</div>
+<div class="row border rounded m-2">
+    <table class="table table-hover align-middle" id="tableMembers">
+        <thead>
+            <tr>
+                <th class="text-center" scope="col" colspan="3">Members</th>
+            </tr>
+        </thead>
+        <tbody>
+            <tr class="text-center" id="emptyTableNotice">
+                <th scope="row" colspan="3">
+                    <p class="text-danger">You must add at least one member.</p>
+                </th>
+            </tr>
+        </tbody>
+    </table>
+</div>
+<div class="row border rounded m-2">
+    <table class="table table-hover align-middle" id="tableNonMembers">
+        <thead>
+            <tr>
+                <th class="text-center" scope="col" colspan="3">Other Users</th>
+            </tr>
+        </thead>
+        <tbody>
+            {% for user in users|sort %}
+            <tr class="userEntry text-center" id="{{ user.username }}">
+                <th scope="row">
+                    <img src="{{ user.get_thumbnail_url() }}"
+                         alt="Profile picture for user {{ user.username }}"
+                         class="img-fluid rounded"
+                         style="max-width: 50px"
+                         >
+                </th>
+                <td>
+                    <a href="{{ url_for('usermanager.user_view', username=user.username)}}">{{ user.username }}</a>
+                </td>
+                <td>
+                    <button type="button" class="toggleMembershipButton btn btn-success">
+                        <i class="bi-person-fill-add"></i> Add
+                    </button>
+                </td>
+            </tr>
+            {%  endfor %}
+        </tbody>
+    </table>
+</div>
+<script src="{{ url_for('static', filename='js/group_create.js') }}"></script>
+{% endblock content %}
diff --git a/lumi2/usermanager.py b/lumi2/usermanager.py
index 8e5c2ed..0467dd8 100644
--- a/lumi2/usermanager.py
+++ b/lumi2/usermanager.py
@@ -343,18 +343,25 @@ def group_list():
     )
 
 
-@bp.route("/groups/create", methods=("GET", "POST"))
+@bp.route("/groups/create")
 def group_create():
-    """Displays a form allowing group creation."""
+    """Creation view for a new group.
+
+    Shows a table allowing adding members to this group.
+    """
 
     try:
         conn = ldap.get_connection()
     except Exception:
         abort(500)
 
+    users = ldap.get_users(conn)
     conn.unbind()
-    # TODO implement
-    abort(404)
+
+    return render_template(
+        'usermanager/group_create.html',
+        users=users,
+    )
 
 
 @bp.route("/groups/update/<string:groupname>")
diff --git a/lumi2/usermodel.py b/lumi2/usermodel.py
index 53db474..626c0a2 100644
--- a/lumi2/usermodel.py
+++ b/lumi2/usermodel.py
@@ -462,8 +462,8 @@ class Group:
     def assert_is_valid_groupname(input_str: str) -> None:
         """Checks whether the input string is a valid group name.
 
-        A valid group name consists of only alphanumeric characters, starts with
-        a latin character, has minimum length 1 and maximim length 64.
+        A valid group name consists of only alphabetic characters, has minimum
+        length 1 and maximum length 64.
 
         Parameters
         ----------
@@ -485,12 +485,8 @@ class Group:
             raise InvalidStringFormatException(
                 "Invalid group name: must contain at least one character."
             )
-        if input_str[0] not in ascii_lowercase + ascii_uppercase:
-            raise InvalidStringFormatException(
-                "Invalid group name: must start with a letter."
-            )
         for char in input_str:
-            if not char in ascii_uppercase + ascii_lowercase + digits:
+            if not char in ascii_uppercase + ascii_lowercase:
                 raise InvalidStringFormatException(
                     f"Invalid character in group name: '{char}'."
                 )