Tickets for 5 Seconds Of Summer's 2015 European tour, which includes dates in the UK and Ireland, went on sale this morning (July 11) and several of the concerts have already sold out entirely so the lads have added a new gig to the list already.

Writing on their collective Twitter page earlier today, the heartthrobs explained that ticket sales are moving so fast they have already added a second date in Dublin at the end of May:

"Copenhagen, Paris, Amsterdam & Dublin now sold out :) added a second Dublin gig on May 29!"

The group's drummer, Ashton Irwin, took to his own social networking site earlier and told fans that this upcoming run of dates will be 'epic': "Hey guys, so excited for this tour, it's going to be absolutely epic! Thank you if you are coming, love you!"

Guitarist Michael Clifford also shared a message about the rate at which tickets are selling, adding: "Holy shit thank you to everyone who has bought tickets for the tour :) y'all are the best."

The full schedule of 5SOS's 2015 tour can be seen below:

• May 4 2015 - Lisbon, Meo Arena
• May 6 2015 - Madrid, Barclaycard Arena
• May 8 2015 - Turin, Palaolimpico
• May 9 2015 - Milan, Mediolanum Forum
• May 10 2015 - Zurich, Halllenstadion
• May 12 2015 - Copenhagen, Forum
• May 13 2015 - Stockholm, Ericsson Globe
• May 14 2015 - Oslo, Spektrum
• May 16 2015 - Berlin, O2 World
• May 17 2015 - Munich, Olympiahalle
• May 18 2015 - Oberhausen, Koenig Pilsener Arena
• May 20 2015 - Amsterdam, Ziggo Dome
• May 21 2015 - Brussels, Palais 12
• May 22 2015 - Paris, Zenith
• May 28 2015 - Dublin, The O2
• May 29 2015 - Dublin, The O2
• May 30 2015 - Belfast, Odyssey Arena
• June 1 2015 - Glasgow, The SSE Hydro
• June 2 2015 - Newcastle, Newcastle Arena
• June 3 2015 - Leeds, First Direct Arena
• June 4 2015 - Birmingham, NIA Arena
• June 7 2015 - Cardiff, Motorpoint Arena 
• June 9 2015 - Manchester, Phones 4U Arena
• June 12 2015 - London, SSE Arena Wembley 
• June 13 2015 - London, SSE Arena Wembley

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