The Only Way Is Essex co-stars Billi and Cara – both 24 – have known each other since school and have never fallen out.

The pair, who both admit to having had boob-jobs, told heat: “We went to the same surgeon”

Billi said: “I went first.” Cara added: “I’d broken up with my boyfriend. I’d always had small boobs and I thought, “I’m just going to do it. So the next week, to piss him off, I just went and got new boobs.”

Bill said: “We’ve both had Botox too. I’ve had it since I was 22. They say the younger you are when you have Botox, the better it takes. My mum and dad are not against it at all. When I was 19 and had my boobs done, I took my dad. I was like, “Look! I need some!””

Speaking about the show’s former star, Mark Wright, Billi revealed: “I’ve known Mark since I was little and I don’t like him at all. I just don’t. I lived down the same street as him. I think he’s changed a lot.”

Cara confirmed that the TOWIE cast get paid £80 a day. Billi said: “We’re not on the show for the money. It’s just life experience.”

The full interview appears in this week’s heat, on sale now (Tuesday).