The 56-year-old actor, who has been active in efforts to reopen Oldham Coliseum, will star in the second season of the show.
She is currently guest curator at the theater and is due to give a Traitors Q&A in partnership with the theater later this year.
Hesmondhalgh has regularly shown his emotions throughout the series.
In a recent episode, he reacted to the news of who was ‘killed’ last night, saying: “No! It doesn’t make any sense!”
Her reaction led contestants, including Miranda Hart and Michael Sheen, to suspect that she might be a traitor.
@BBC 💥First look: When someone tells me “Play it cool” 😊 #celebritytraitors #terrorist #TheTraitorsUK #claudiawinkleman ♬ Original Sound – BBC
They thought she might be overcompensating to appear innocent.
Hesmondhalgh was later exiled from the castle after gaining a majority at the Round Table.
She then reveals that she has been a loyalist throughout the series.
The moment has been garnering a lot of attention since the episode aired.
Fans have taken the clip and added it to their statuses on other platforms, including TikTok.
One video used these words: “POV: When husband calculates how much money I spent on books last year.”
@feistybookblog Makes no sense at all! ??? #celebritytraitor #booktok #book humor #fyp #book lover ♬ Original Sound – Pixel Panic Gaming
Another was titled: “Dogs when you pretend to throw your toy.”
One user said: “When someone tells you about gossip at work that you already know about, and you have to act like it’s breaking news.”
Brands and organizations have also joined the trend.
@rnli What they mean by ‘qualified'[Visualdescription:AnRNLItractordrivingoutoftheseaJulieHesmondhalghfeaturesonthescreeninaclipfromtheBBC’sCelebrityTraitorsTextonscreenreads:’RNLIsocialadminwhenourmanagersayswe’renotqualifiedtodrivethetractors😒'[दृश्यविवरण:एकआरएनएलआईट्रैक्टरसमुद्रसेबाहरनिकलरहाहै।बीबीसीकेसेलिब्रिटीट्रैटर्सकीएकक्लिपमेंजूलीहेसमंडहल्घस्क्रीनपरदिखाईदेतीहैं।स्क्रीनपरटेक्स्टपढ़ताहै:’आरएनएलआईसोशलएडमिनजबहमारामैनेजरकहताहैकिहमट्रैक्टरचलानेकेलिएयोग्यनहींहैं😒'[Visualdescription:AnRNLItractordrivingoutoftheseaJulieHesmondhalghfeaturesonthescreeninaclipfromtheBBC’sCelebrityTraitorsTextonscreenreads:‘RNLIsocialadminwhenourmanagersayswe’renotqualifiedtodrivethetractors😒’#RNLI #Tractor #terrorist ♬ Original Sound – Pixel Panic Gaming
The RNLI shared the clip with the caption: “RNLI Social Admin When our manager says we’re not qualified to drive tractors.”
Estate agent 5th Avenue posted it with the caption: “When a buyer says he’s a cash buyer… he has to sell his house first.”
Award-winning actress Julie Hesmondhalgh has become a vital champion of Oldham’s cultural landscape by leading a passionate campaign to save the historic Oldham Coliseum Theatre.
His dedication to revitalizing local arts recently earned him the prestigious Great British Theatre’s Lifetime Achievement Award.