One Direction's hit first single 'What Makes You Beautiful' will make an appearance on 'Glee' next week in a special Prom episode, accordint to the Daily Mail.

'What Makes You Beautiful' reached number one in the UK and number four on the US Billboard Hot 100.

"To have a song in Glee is just fantastic. We're all big fans of the show and are so excited they chose What Makes You Beautiful for an episode," said One Direction member Niall Horan.

Said 'Glee' star Matthew Morrison: "I’ve just heard of them, they’re really taking over the States."

"We are covering one of their songs on Glee — What Makes You Beautiful. I need to YouTube it to practice."

"They’ve made it now though, they’re on Glee!" he joked. "This will probably help their record sales too."