I'm A Celebrity fans aren't happy, at all.

The latest series of the popular reality show is in full swing and everyone's favourite presenting duo, Ant & Dec, are back at the helm of the programme. However, they have come under fire for a joke made on last night's instalment, involving physicist, author and researcher Stephen Hawking. Stephen, whose scientific theories have received critical acclaim, has a rare slow-onset form of motor neurone disease, a condition also referred to as ALS (amyotrophic lateral sclerosis). During last night's show, footage was played of Gogglebox's Scarlett Moffatt discussing a time she tried to email Hawking about a time travel theory she had concocted. However, it's what happened next that really got on people's nerves as Ant picked up a phone and pretended to chat to Stephen as an automated voice, similar to the electronic one used by the esteemed professor, played from a nearby speaker. Unsurprisingly, people were far from amused and took to Twitter, expressing their dismay at the ill-fated joke.

Ant & Dec may be a household name, but seriously, they should watch who they chaff. They've got nothing on Stephen Hawking tbh. #ImACeleb

— Vicky Bartlett (@bartlett_vicky) November 17, 2016

#ImACeleb bit too far with Stephen Hawking's??

— Oh (@ellieshabrandoh) November 16, 2016

Have them twats just took the piss out of Stephen Hawking?....thats really low and not funny at all. #ImACeleb

— Tim (@Dangerous180) November 16, 2016

I found the Stephen Hawking jokes extremely distasteful tbh #ImACeleb

— fliss (@xntisxcial) November 16, 2016

shame on #imaceleb for taking the mickie out of stephen hawking!

— charlie watts (@chuxly) November 16, 2016

Oooooooh. Risky. Taking piss out of Stephen Hawking #ImACeleb

— Blake Jones (@RadioBlake) November 16, 2016

Proper think that Professor Stephen Hawking gaff was a bit wrong!! #ImACeleb

— dudsey (@dudsey_) November 16, 2016

However, other people pointed out the funny side of Scarlett contacting Stephen with her theory.

Scarlett on about emailing Stephen hawking ahaha I'm crying ????? #ImACeleb

— Amy Elizabeth (@amyelizabeth_90) November 16, 2016

Absolutely creasing @ #ImACeleb @ScarlettMoffatt is hilarious!!! Tried to email Stephen Hawking hahaha!! #myfavealready #scarletttowin

— Laura Jayne (@LJS_89) November 16, 2016

Scarlett saying she emailed Steven Hawking on a hotmail account made me howl?? #ImACeleb

— LILS HOPKINS MURPHY (@lilyhm_25) November 16, 2016

Main image via Twitter: I'm A Celebrity