Charlie was joined by sister and TOWIE co-star Chloe, as well as their younger sisters Demi and Frankie, at the Shepherd & Dog pub and restaurant in Romford.
Taking to Twitter, Charlie said: "Lovely family meal @RealShepherdDog for my birthday! Was great to spend some quality time with them. And thanks for all my messages today!"
Mum-of-one Chloe, who is gearing up to open her first hair and beauty salon called Chloe's Beauty Bar, looked chic in a white frilly top and jeans.
The brother and sister later posed for some photos, with Chloe cheekily making a finger gesture behind Charlie! Captioning the snap, Chloe simply said: "Birthday posing."
It's been quite a birthday celebration for Charlie, who also partied with his co-stars on Sunday, including his ex-girlfirend Ferne McCann.
Charlie was inundated with birthday messages from his fans and co-stars, including best friend Mario Falcone, who said: "Happy birthday to my best friend, lover and brother from another mother @charlessims_... See you later mate! Xxx."
Tweeting fans, Charlie also wrote: "Thank you for all my birthday messages! Means so much."
Charlie really is seeing in another year in style, as he'll be hosting his official birthday celebrations at London hotspot Funky Buddah tonight!
TOWIE continues on Wednesday 19 March at 10pm on ITV2.
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