Ant and Dec's Saturday Night Takeaway's two-hour grand finale includes stellar celebrity line-up and a surprise appearance from iconic band

Ant and Dec's Saturday Night Takeaway's two-hour grand finale will feature an array of star-studded guests and a top performance from an iconic girl band.

The famed Geordie stars will end their popular ITV series on high before its hiatus, with a jam-packed show live for an extra hour than usual.

Airing on April 13, the season finale will be the show's biggest yet - featuring the final part of Ant & Dec’s comeuppance in Get Out Of Me Ear: The Revenge, a super sized Singalong and the winner of Ant vs Dec hosted by Stephen Mulhern will be revealed.

The stellar celebrity line-up includes Ashley Roberts, S-Club, Scarlett Moffatt, Andi Peters, Kaiser Chiefs, Jordan North and Tony Hadley.

Celebrities taking part in Get Out Of Me Ear: The Revenge are Simon Cowell, Amanda Holden, Dermot O’Leary, Alison Hammond, Holly Willoughby, Rylan, Oti Mabuse, Olly Murs, Davina McCall, Gino D’Acampo, Craig David, Richard Madeley and Cheryl.

Girls Aloud - Nadine Coyle, Kimberley Walsh, Nicola Roberts and Cheryl - will be the Star Guest Announcers for the finale and could be giving their first television performance in 14 years.

Viewers can also expect a special montage of the show's best bits from the past 20 series, loads more live surprises and an amazing End of the Show Show!

Ant said: 'We can't believe there are only a few shows left and we’re getting closer to the end. This series has been very special to make and we’re looking forward to making the last show a party to end all parties. 

'The SNT production team have been working non stop to ensure this special, two hour finale has that SNT magic from start to finish.'

Dec added: 'The finale will be a real celebration of Saturday Night Takeaway over the years. We're honoured and touched that for 20 series it's been part of Saturday night TV viewing for so many families across the country. 

'We're giving it (and us!) a rest for now, but we'll take away and treasure some very special memories and moments. We will most certainly miss it.'

In February, Ant and Dec revealed Takeaway is going on hiatus so they can focus more on their families, ahead of Ant welcoming his first child.

Ant is set to become a father in June after it was revealed his wife Anne-Marie Corbett, 46, is expecting their first child together. Anne-Marie has two children from her previous marriage.

Speaking to Fault Magazine, Ant said: 'On a more personal level, part of the reason we're pausing Takeaway is we need a break ourselves, and we need to spend some time with our family. 

'We've both got children that we need to spend time with for a little bit. We need time to think and, and time to step back and look at the bigger picture and just see where we are now.'

The pair will continue their exclusive working relationship with ITV, hosting hit shows including I'm A Celebrity… Get Me Out Of Here!, Britain's Got Talent and Limitless Win, all of which air across ITV1 and ITVX.