They have been friends for the best part of 30 years but could Ant McPartlin and Declan Donnelly be about to find out they're related after all this time?
That's what some fans think after watching the presenting duo's new documentary, Ant & Dec's DNA Journey.
The first part of the double-episode doc aired on ITV on Sunday night (November 10) and saw the Geordie-natives find out some pretty impressive information on their ancestors.
Ant was shocked to discover, just like Dec, has Irish heritage which linked him to half a village in Drumkeeran a village in County Leitrim, Ireland.
Dec also had a surprise of his own when he was told that he is related to Impact Wrestling president Dixie Carter.
The wrestling star also revealed that her family's business has earned a staggering $5 billion in the last year.
But those watching at home think the biggest surprise is yet to come when the second part airs at 9pm on Monday night (November 11).
"Pleeeeeeease just tell us they are actually related! #DNAjourney," tweeted one hopeful viewer.
Another said: "Surely this #DNAjourney will end up with #antanddec being related?!"
A third made clear: "If this doesn’t end with Ant and Dec finding out they’re related I’ll be very disappointed."
Before a fourth added: "Just got this strange feeling it’s going to turn out that you’re related in some way #DNAjourney I do hope so."
Fans of the pair, who first met at just 13-years-old on the children's TV series Byker Grove, were also left a little emotional by the episode as Ant and Dec discussed how their friendship was heavily tested during Ant's struggle with addiction.
The issue was brought up as the pals began their DNA journey back in 2017 but the project was halted for two years as Ant took a break from work to recover.
An emotional Dec said: "It's been a tough couple of years, it's really tested the bond that we've shared since we were 13 years old.
"I was incredibly angry at the start, so angry, disappointed in him that he didn't ever come to me and say, 'I'm struggling, I need you.'"
The dad-of-one also said that there were times he thought the pairs friendship and working relationship wasn't "going to survive."
But viewers were quick to praise the best mates "unbreakable" bond.
"I usually don't cry from TV or movies... But dear God that had me in tears... #DNAjourney @antanddec," tweeted one.
Another said: "@antanddec honest, brave and heartwarming. You both show true friendship is totally unbreakable. #DNAjourney."
Ant & Dec's DNA Journey continues at 9pm on ITV.
