The 'I'm A Celebrity' and 'Britain's Got Talent' presenters will replace James Corden, who has hosted the event since 2011.
It won't be the first time the TV duo have taking the helm of the biggest night in British music, having hosted the awards in 2001.
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Ant and Dec
"We're really excited to be hosting the Brits again next year," the duo said. "It is undoubtedly the biggest night in the British music calendar."
Brits chairman Max Lousada described the pair as 'two pillars of British TV'.
"Ant and Dec are two of the most popular TV broadcasters this country has ever produced," he said.
"It's great that these two pillars of British TV will be part of a night about celebrating icons in British music."
Next year's Brit Awards will take place on 25 February at the O2 Arena in London.
The 2015 statuettes have been designed by artist Tracey Emin. who follows in the footsteps of Sir Peter Blake, Damien Hirst and Dame Vivienne Westwood.
Last year's TV broadcast attracted an audience of 4.6 million - the lowest since 2006.
Ant and Dec Through The Years
(01 of17)
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Ant and Dec, aka PJ and Duncan, in 1994. (Photo credit: Getty)
(02 of17)
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British pop duo PJ and Duncan instore at HMV in 1994. (Photo credit: PA)
(03 of17)
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Ant and Dec, aka PJ and Duncan, in 1994. (Photo credit: PA/Jez C Self/EMPICS Entertainment)
(04 of17)
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Ant and Dec larking about with Sesame Street puppets Bert and Ernie in 1996. (Photo credit: PA)
(05 of17)
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Pop duo PJ & Duncan in the studio in 1996 (Photo credit: PA)
(06 of17)
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PJ and Duncan in concert at the Royal Albert Hall in London in 1996. (Photo credit: PA)
(07 of17)
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Ant and Dec celebrate the 10th Anniversary of Byker Grove with fellow stars in 1998. (Photo credit: Rex Features)
(08 of17)
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Ant and Dec with Cat Deeley in 1998, co-hosts of SMTV://Live. (Photo credit: PA)
(09 of17)
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Anthony McPartlin (left), and Declan Donnelly, Ant & Dec, with their Most Popular entertainment Presenter awards at the National Television Awards at the Royal Albert Hall in London in 2002. (Photo credit: PA)
(10 of17)
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Pop Idol presenters Anthony McPartlin (left) and Declan Donnelly (right) celebrate with Will Young from Hungerford, Berkshire, at the Fountain Studios in London, after he was voted Britain's Pop Idol in 2002. (Photo credit: PA)
(11 of17)
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Pop Idol judges (from left) Simon Cowell, Pete Waterman, Nicki Chapman and Neil Fox, pose with show hosts Ant and Dec (Anthony McPartlin & Declan Donnelly) during a press conference at Thames TV in London, to launch a new series of Pop Idol in 2003. (Photo credit: PA)
(12 of17)
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Anthony McPartlin and Declan Donnelly pose with the awards for Best Comedy Entertainment Personality and Best Comedy Entertainment Programme for Ant & Dec's Saturday Night Takeaway in the Awards Room at the 'British Comedy Awards 2004' on December 22, 2004 at London Television Studios in London. (Photo credit: Claire Greenway/Getty Images)
(13 of17)
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Ant and Dec as The Ugly Sisters in Madame Tussauds Celebrity Pantomime in 2005. (Photo credit: PA)
(14 of17)
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Anthony McPartlin (left) and Declan Donnelly (right) with the Entertainment Performance award received for I'm a Celebrity Get Me Out Of Here! at the BAFTA television awards at the London Palladium in 2010. (Photo credit: PA)
(15 of17)
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Ant and Dec take part in the 'I'm A Celebrity...Get Me Out Of Here!' Bush Tucker Trial 'Greasy Spoon', in November 2011. (Photo credit: Rex Features)
(16 of17)
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Anthony McPartlin (left) and Declan Donnelly arriving for the 2012 NTA Awards at the O2, Greenwich, London. (Photo credit: PA)
(17 of17)
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Anthony McPartlin (left) and Declan Donnelly with their awards for Entertainment Presenter, backstage at the National Television Awards 2012 at the Greenwich Arena London. (Photo credit: PA)