The actors have grown up together on set, with most of the hugely-successful franchise's stars landing the roles before they had turned 11 years old.
Bonnie Wright, who plays Potter's soulmate Ginny Weasley, has shed some light on their activities during filming - and the clean-cut actors are not as innocent as they appear.
She tells the London Paper, "Sometimes we talk about sex when we're hanging out on the set. We grew up on the set through our teenage years, so we laugh about it together.
But the 17 year old insists Daniel Radcliffe's recent claims that the young stars were all "horny teenagers" during the earlier projects is pushing it too far.
She adds, "I think that was blown out of proportion. That's probably just Daniel.".