diff --git a/live-build/ubuntu-core/hooks/02-add_user_to_groups.chroot b/live-build/ubuntu-core/hooks/02-add_user_to_groups.chroot
new file mode 100755
index 00000000..2e48e233
--- /dev/null
+++ b/live-build/ubuntu-core/hooks/02-add_user_to_groups.chroot
@@ -0,0 +1,8 @@
+#!/bin/sh -x
+
+USER=ubuntu
+
+DEFGROUPS="sudo"
+
+echo "I: add $USER to ($DEFGROUPS) group(s)"
+usermod -a -G ${DEFGROUPS} ${USER}