The pair revealed that judge Alesha Dixon was expecting a child and the crowd erupted as they sang it.
They decided to add the announcement during their musical number, and it seemed to get a great reaction from the crowd and the show’s audience.
Alesha later told the pair she was “over the moon” with the news and happy to celebrate on the ITV talent show.
After their opening number, Ant and Dec went to the judges’ table to talk directly to Alesha about her happy news.
Alesha told the pair she was “over the moon” with the news and happy to celebrate on the ITV talent show.
As fellow judge David Walliams joked the baby was really his, joking: “Things happens when you’re on tour.”
Alesha continued to add she was “very happy” and thrilled to be celebrating with the Britain’s Got Talent live audience.
Fans rushed to congratulate Alesha on her news on Twitter with one writing: “BGT congratulations to Alesha.”
Another added: “So cute that alesha’s pregnant #bgt congratulations Alesha … @AleshaOfficial.”
One more viewer added: “Fair play, that was an impressive way for Alesha Dixon to announce her pregnancy #BGT.”
“Aww what a lovely way to announce Alesha is pregnant #BGT @AleshaOfficial,” commented one more viewer.
The opening performance on Saturday saw Kath Thompson storm on to stage to ABBA’s Dancing Queen while doing the robot made famous by the Prime Minister.
However, she didn’t stop to talk to the judges as she burst out into an energetic dance routine, poking fun at the Conservative leader’s skills on the floor.