In a statement read out by Phillip Schofield, Prince Charles paid tribute to Ant and Dec:
The warmth and empathy they show towards charitable causes, their viewers and their deep friendship towards one another are as great achievements as their countless and well-deserved awards.
The nation has taken them to their hearts.
Ant and Dec celebrated being honoured with a Landmark Award and the National Television Award by taking a selfie while on stage:
Ant and Dec have been presented with a special Landmark award at the National Television Awards for their 25 years in television.
Ant told the crowds: "The last 25 years have been a pleasure and we genuinely love it."
Watch the National Television Awards live on ITV and you can catch up later on ITV Player.
Ant and Dec are up against themselves as two of their shows are nominated in the same category at the National Television Awards.Read the full story ›
Geordie duo Ant and Dec will be the final castaways on this year's Desert Island Discs - the first time two guests have appeared together on the show in more than 25 years.
The pair, Anthony McPartlin and Declan Donnelly, are presenting ITV's I'm A Celebrity ...Get Me Out Of Here! and will be on the Radio 4 show on Sunday December 29.
The last time the studio hotseat was shared between two people was in 1987 when Spitting Image creators Fluck and Law were sent to the desert island together.
Ant and Dec, who first met when they worked as child actors on the BBC show Byker Grove, have gone on to host some of the country's most popular shows including Britain's Got Talent and Ant and Dec's Saturday Night Takeaway.
When they appear on Desert Island Discs, they will choose two tracks each and four together and will be allowed a luxury item and a book each.
And and Dec are so close they accidentally bought each other the same games console for Christmas last year, it has emerged.
The Geordie duo, who became friends on the set of children's TV show Byker Grove, got each other the console which can be used to play games on the iPad after spotting it during a trip to New York.
Declan Donnelly explained: "I remember seeing it and thinking Ant would like that and I would like one myself.
"And we ended up buying it for each other. We did laugh a lot when we realised."
The pair are joining other stars including Phillip Schofield and Holly Willoughby to host ITV's Christmas charity show Text Santa next month.
Presenting duo Ant and Dec scooped three awards for their ITV shows at the TV Choice Awards.Read the full story ›
R.I.P Eddie Braben. And thank you. X
What a great and lasting contribution Eddie Braben made to British comedy.
A survey has revealed that women prefer Dec over Ant.
54% of 4,000 women questioned in a survey said they preferred Dec to his TV presenter partner.
But Ant should not be too disheartened as more than three-quarters thought he would make the best friend, with 81 per cent preferring the idea of sharing a cup of tea and a chat with him.
They are back presenting Britain's Got Talent on ITV this Saturday night.
Thanks to you mental lot who downloaded the track. It's all down to you. We are no1! Still can't believe it! A #LetsgetreadytoRhumble