The star has been left with severe whiplash and bruising after a taxi she was travelling smashed into four cars, according to the Daily Mail.
Rosie was on her way back home after a night out on Friday when the horror crash happened on Fulham Road in Chelsea.
A source told the paper: "The driver fell asleep at the wheel and veered into four cars outside Maggie's nightclub."
Rosie carried on with her journey following the accident, despite being warned by onlookers to wait for police, and is now recovering from her injuries.
She subsequently missed out on joining the rest of her castmates at the TV BAFTA Awards, where the show picked up the gong for Best Reality Or Constructed Factual Programme.
However, she did tweet her surprise at the show's victory, writing: "Can't believe we won a BAFTA! #madeinchelsea."
Rosie was recently the latest cast member to speak out against the show love rat Spencer Matthews, branding him "disgusting".