5 Seconds of Summer have opened their latest world tour.

The lads kicked off their Rock Out With Your Socks Out jaunt in Lisbon, Portugal on Monday (May 4).

They began their set with 'End Up Here' before playing the likes of 'Rejects' and 'Amnesia'.

The gig ended with a double-header of 'Good Girls' and 'What I Like About You'.

Speaking after the show, guitarist and singer Luke Hemmings said on Twitter:

"PORTUGAL, you were wonderful! Great start to the tour, let the good times roll!"

Drummer Ashton Irwin said: "My my my Lisbon that felt absolutely wonderful. I love you, see you again soon!!! YOU ROCKED #ROWYSO."

5 Seconds of Summer will return to the UK on their tour in June.

Watch 5SOS perform in Lisbon below: