Daniel Radcliffe, Rupert Grint
Rupert and Radcliffe found fame playing Ron and Harry in the Harry Potter movies. Reuters

Harry Potter stars Daniel Radcliffe and Rupert Grint have brought their magic touch from the big screen to the stage.

The acting duo, who found fame playing Ron and Harry in the Hogwarts franchise, took home top acting accolades at the 2014 WhatsOnStage Awards.

Radcliffe, who made his theatre debut in 2007 when he took on the lead role in Equus, won the Best Actor prize for his performance in Martin McDonagh's black comedy The Cripple of Inishmaan

The play is about a disabled man who is a victim of bullying but dreams of an acting career in Hollywood.

The 24-year-old former wizard said that he was "honoured" that his work was being celebrated.

"I am deeply honoured to receive this prestigious award and I accept it on behalf of the whole cast who together helped make this production... a truly joyous experience for me as an actor"

Grint, who has taken to the stage like a duck to water was named Newcomer of the Year for his stand out performance in Jaz Butterworth's Mojo.

The 25-year-old flame-haired star revealed that it was Radcliffe that encouraged him to add theatre to his glowing list of accomplishments.

"Dan has always said it's a great thing to do and he absolutely loves it. Just watching him enjoy it told me it must be quite fun," he said.

Dame Helen Mirren was also honoured at the awards which was voted for by the public. She was crowned Best Actress in a Play for her role as Queen Elizabeth II in The Audience.