Saturday Night Takeaway aired a hilarious prank on This Morning's Alison Hammond, that left her swearing in fear.
Believing she was in a haunted hotel, the terrified TV presenter was soon screaming in horror before realising it was all set up.
The ITV show made its big return on Saturday night, with hosts Ant McPartlin and Dec Donnelly back to entertain the nation.
But despite always believing she would never be pranked by the pair, Alison found herself their latest Undercover victim.
It almost backfired, when Alison arrived at the 'haunted' hotel and didn't like what she saw.
She almost fled in the taxi, but was convinced to say - only for her to end up regretting the decision thanks to some spooky antics.
From ghost stories to a fake urn containing 'ashes' falling off a shelf by itself, Alison soon found herself making contact with the supposed spirits.
As she asked them to show they were there, Ant and Dec caused the lights to flicker and Alison began swearing.
But the fun wasn't over, as she headed to her creepy room containing scary looking dolls.
That was the least of her worries though, as her TV began playing white noise and Alison got the feeling something wasn't right.
Convinced the hotel was haunted, she got the shock of her life when two faces suddenly appeared in a mirror on one of the walls looking back at her.
As she began screaming and launched herself backwards towards the bed, hosts Ant and Dec revealed themselves and she realised she'd been fooled.
She told them: "Oh my God, I've never been so scared in my life. You actually got me, that was so good. That was awful."
Viewers tuning in were in hysterics over the segment, and some called it the "best Undercover ever".
One fan said: "That was brilliant!!! I absolutely love Alison Hammond!!! Very well played Ant and Dec!! Brilliant!"
Another tweeted: "Alison Hammond was an absolute scream!!!The perfect got you!!"
A third fan added: "Brilliant show as always. The prank they've played on Alison Hammond in the haunted hotel was a classic. I literally cried with laughter."
This was echoed by another viewer who said: "Scaring Alison Hammond, this is one of the best #Undercovers, @antanddec have ever done."
The latest series of the cheeky show will see cameos from the nation's favourite P.E teacher Joe Wicks and Strictly Come Dancing host Claudia Winkleman, with Alison and Rylan Clark as the next unwitting victims of their very own Undercover.
Viewer favourites are back including Ring My Bell, Singalong Live and Win the Ads and there are some brilliant End of the Show Shows planned throughout the series run which as always will entertain.
Stephen Mulhern, Fleur East, Jordan North and Andi Peters will all help hosts Ant and Dec out throughout the series once again, with Stephen putting the boys through a brand new set of high octane Ant vs Dec challenges.
Ant and Dec had teased the return of the series earlier this month, as they shared a tweet from the official Saturday Night Takeaway Twitter page.
Saturday Night Takeaway airs Saturdays at 7pm on ITV1 and ITVX.
