Zayn Malik, Louis Tomlinson and Niall Horan head into the X Factor set in Los Angeles on Thursday afternoon (December 20).

The trio were greeted by a few crew members before joining band mates Liam Payne and Harry Styles (not pictured) inside for rehearsals.

Don’t forget to watch One Direction on X Factor USA TONIGHT! They guys will be performing just before the winner is announced.

Just the night before, Liam, Zayn and Louis stopped by the Shamrock Tattoo Parlor for a visit and some new ink.

Liam was also spotted playing a game of pool inside.

10+ pics inside…