Lucy Watson's younger sister Tiffany is set to join the new series of Made in Chelsea.
The brunette beauty made the double trouble announcement on Twitter, writing, "Welcome to #MIC @Tiffany_W13 #sistasistaaaaa."
Better known as Tiff, the blonde beauty is described as "active and sociable" and "very dedicated to her elder sister".
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Lucy Watson and younger sister Tiffany Watson
She even works with Lucy on her jewellery line Creature and despite the odd sisterly rift, the pair are almost inseparable, often taking to Twitter and Instagram to pose for photos together.
While the blonde beauty is currently single, potential suitors will no doubt have to get past protective Lucy to have a chance with Tiffany.
Two other cast members have also signed up for the eighth series, Alex Mytton's university friends – Lonan O'Herlihy and Will Colebrook.
Currently single Tiffany Watson is described as 'active and sociable'
Lonan, 25, has "a penchant for fast cars and petite blonde women" and is the director of an elite personal training company. He also knows Toff – real name Georgia Toffolo – who briefly starred in the previous series.
Will, meanwhile, is another university acquaintance of Alex and a "romantic at heart" who is "guilty of falling in love hard and fast".
Apart from being a real party boy, the 24-year-old is also a cyclist, surfer, skateboarder, entrepreneur, property developer, adrenaline junky, personal trainer and freestyle ski instructor – to name a few talents.
Alex Mytton's university friends Will Colebrook and Lonan O'Herlihy will also join the cast
The normal cast will return to screens on Monday 13 October to provide more drama, rivalries and jaw-dropping storylines.
Louise Thompson and her new American boyfriend Alik Alfus are still going strong, having started dating while the Chelsea beauty was in New York for the spin-off summer series.
Fellow American Stephanie Pratt, who is good friends with Lucy Watson, will also feature on the show, having just collected the keys to her new London abode.