The pair haven’t been seen on a TV show together since last year’s BGT auditions, as Ant McPartlin bowed out of presenting the live shows shortly after his arrest for drink-driving.
He also decided to temporarily step down from hosting I’m A Celebrity... Get Me Out Of Here!, with Holly Willoughby joining Declan Donnelly down under for last year’s run.
However, in January, Ant rejoined Dec for the BGT auditions and will also be back by his side for the new series’ live shows.
In the newly-released BGT 2019 promo clip, the presenters play conductors, guiding a hall full of entertainers through a rendition of Land Of Hope And Glory.
The four BGT judges also pop up, with Amanda Holden becoming a spellbinding magician’s assistant and David Walliams playing the cymbals, as a host of acts try to avoid Alesha Dixon’s red buzzer and earn the approval of Simon Cowell.
The promo clip will air on ITV at 9pm this Saturday, but you can watch it now above.
BGT will return in April for its 13th series, with acts from all over the UK competing for the crown and a £250,000 prize.
Last year’s winner was comedian Lee Ridley, who performs under the name Lost Voice Guy.
After triumphing on the show and performing at the Royal Variety Performance, Lee announced his first ever UK tour last year and is set to embark on a second in 2019.
He also competed in the international all stars series, America’s Got Talent: The Champions, alongside other fan favourites Susan Boyle and Paul Potts.