First we want to congratulate Liam in his 10 year One Direction anniversary! What an achievement and milestone! When it comes to his hairstyle, there is not much we can say is wrong. This hairstyle is pure perfection and the nice thing about it is that it is easy to style in the morning. The cut shapes his face well and can be used as a casual or a formal look.
You are going to need to use some product to lock in this look so that it does not move during the day. If you want to go with the triggered beard look as well, that is great! Just make sure that you maintain your beard and do not let it start to grow out of control.