The co-stars have been dating since Josh joined the E4 reality show last year and despite seeming pretty smitten during a romantic trip to Rome last month, it seems the pair have now called time on their romance.
Suggesting she and Josh have gone their separate ways, Stephanie has deleted all photos of Josh from her Instagram feed, as well as posting two cryptic tweets following last night's episode of Made In Chelsea.
After falling out with BFF Lucy Watson because of boyfriend Josh (Josh and Lucy came to blows earlier this series), viewers watched Steph try to make amends with her co-star in yesterday's episode.
The girls had hinted their friendship was back on track after being pictured in LA together and following last night's show, Lucy shared a photo of herself and Steph together, tweeting: "Never again."
And suggesting all is not well with herself and her beau Josh, Steph replied: "Sorry a crazy boy came between us :( love you bub. Never again."
In another tweet, she added: "Living is learning and I still am. I love you @imLucyWatson sorry I was #sleepingwiththeenemy."
If Stephanie and Josh have split, their break up will comes as a surprise to fans as the pair had seemed pretty serious together.
Only last month, Steph had told Reveal things between her and Josh were "better than ever".
Reveal has contacted a rep for MIC for comment.
Stephanie's hints that she and Josh have ended their relationship comes after viewers watched her rekindle her friendship with Lucy.
After not speaking to her former bestie, Stephanie finally approached Lucy. She told her: "I've been wanting to text you a million times. I hate that you don't get on with Josh. I think we are all responsible for our parts in that fight... I would like to think we could have our own friendship without Josh."
Lucy replied: "For me I feel like someone has died. I don't see you, I don't hear from you, I feel like this person has just disappeared out of my life... I'm sorry if I did anything that was rude, I never meant it to be."
Since clearing the air, the girls have been filming together in LA. While Steph had arrived in LA with Josh, she has since been spotted spending time with Lucy, Binky Felstead and Louise Thompson.
Made In Chelsea's LA spinoff is set to hit screens later this year.
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