Sophia Sassoon, Andy Jordan, Sam Cussins, Stevie Johnson and Ianthe Rose Cochrane-Stack join the returning cast for more parties and complicated romances in South London.
[Andy, Sophia, Ianthe, Stevie, Sam]
Sophia, 21, has ditched her career as an actress and model in New York for Chelsea. She also previously had a relationship with Made in Chelsea regular Spencer Matthews.
"I am very excited to join Made in Chelsea. I've been enjoying 'the city that never sleeps' for the last three years but now I'm back in Chelsea and can't wait to catch up with old friends," she said.
"I'm single so when it comes to romance, who knows what the future holds?"
Andy is a friend of show regular Jamie Laing and works as a broker. He's a surfer and wants to set up his own water sports business.
His friends - Sam, a "cheeky" cricketer from Sussex, and Eton-educated Stevie - are both single and looking for romance on the show.
[Sophia, Stevie, Andy, Sam, Ianthe]
"I can't wait to mix up the dynamic of the current cast in the new series and I'm looking forward to getting to know one person in particular!" said Stevie.
Sam said: "I'll be looking to take a few ladies on a few dates - will certainly be interesting to see how that goes!"
Meanwhile, 21-year-old Ianthe is dating current cast member Richard Dinan and the fashion student is described as "spoiled" and "opinionated".
"I joined Made in Chelsea because I believe you should take opportunities when they come out of the blue," said Ianthe.
"I met Richard through mutual friends and I'm really excited to see how the summer turns out. I hope I get along well with the rest of the cast, it's a little intimidating, feels like starting a new school!"
Francis Boulle, Richard Dinan, Gabriella Ellis, Binky Felstead, Fredrik Ferrier, Rosie Fortescue, Victoria Baker Harber, Cheska Hull, Jamie Laing, Ollie Locke, Harriet Loder, Millie Macintosh, Spencer Matthews, Henrietta Moore, Ollie Proudlock, Louise Thompson and Mark-Francis Vandelli will all be returning for filming of the fourth series.
The show's latest run will air in the autumn on E4.