The audience and Dec weren't the only ones to express their love for the BGT host, Simon Cowell also commented on Ant's return. He is expected to return to I'm A Celebrity later this year. "I mean even though Dec was brilliant, it still wasn't the same", the music mogul said.
He also commented on Ant McPartlin's return to host the series, following an absence on screen previous year.
They went on to create their singing act "PJ & Duncan" and by 1995 were hosting their own show, The Ant & Dec Show. "So on behalf of all of us, welcome back".
'Britain's Got Talent' returns to ITV in the spring.
Manny Pacquiao v Adrien Broner
Pacquiao, whose pro career stretches back 24 years, showed he still has the speed that carried him over his spectacular career. Although I wanted to be aggressive more, my camp told me don't be careless and to counter him and wait for opportunities.
The stars arrived at the back entrance of the theatre in an SUV, but did not answer questions from the media.
At the end of previous year, Ant posted a tweet from the presenting duo's joint account suggesting he was ready to get back in the studio.
He wrote: "Back together". Get Me Out of Here! took place without him too, with Dec flying out to Australia to present the show with Holly Willoughby in Ant's place.
Later that year, Ant entered rehab following struggles with a two-year addiction to painkillers as a result of a knee operation.
He was later fined £86,000 and given a 20-month driving ban after pleading guilty to drink driving.
Simon and Amanda have been the judges of every season of Britain's Got Talent, while David and Alesha have been on the show since season six in 2012.