Emma Watson's phone blasts Tina Turner mid-interview

Always composed, always polished: Emma Watson has reputation for being one of the most composed actresses.

But this veneer slipped yesterday when her phone suddenly started blasting out Tina Turner on full volume in the middle of an interview.

The Harry Potter actor went from talking earnestly about her forthcoming film Colonia, a historical romantic thriller set against the backdrop of the Chilean military coup, to rushing to turn off the 1989 classic 'Steamy Windows' and looking a little mortified in the process.

“That is so embarrassing! That is my phone. That is Tina Turner,” she gasped.

“Well I’m glad I’m forgiven because it’s Tina Turner otherwise that would have been terrible. I’m so sorry,” she apologised and the interview moved smoothly on.

The musical legend might have been born exactly half a decade prior to Watson and the song may have come out before she was born but she is evidently something of a fan - or diehard enough to change her ringtone anyway.

Watson stars alongside Daniel Brühl in the Florian Gallenberger directed film which follows her character as she becomes absorbed into the Colonia Dignidad sect while trying to hunt down her abducted boyfriend. It has opened in the US and is now arriving in the UK.