The 70-year-old actress is known for being young at heart, and showed that she's very much in touch with today's youth as she hosted the Stuttering Association for the Young gala with Kelli O'Hara in New York on Monday night (02May16).

When Helen complimented her co-host Kelli on her tap dancing skills, the former decided to instead show off her twerking skills.

"Kelli asked Helen if she knew how to tap," a guest at the event told the New York Post's gossip column Page Six. "Helen responded, ‘No, I twerk’ - and did. They ended up having a ‘twerk-off.’ They both went for it... It was glorious."

Helen has previously spoken about her love of twerking - a provocative dance move that involves a squatting stance and hip thrusting - admitting it was inspired by Beyonce.

"It’s true, I’m a huge fan of Beyonce and I do love to twerk. I love dance. I am mesmerised by it," she told Hello magazine. "It's unbelievable how they do it. I always like it when a new dance arrives on the scene."

And when she was asked if she had twerked in front of the mirror, Helen laughed: "I actually might have done that!"

It seems the practice paid off, judging by a picture of Helen at the gala. In the snap, Helen is seen wearing a floral dress, heeled sandals and a red cardigan as she pushes her derriere out, while Kelli screams with laughter.

The gala comes just days after Helen rocked up to the White House Correspondents’ Dinner wearing a temporary tattoo honouring late singer Prince, who died last month (Apr16).

It may be that Helen at some point chooses to make the marking a permanent one, as she already has one tattoo - a pair of interlocking Vs on her left hand which remind her of the importance of tolerance.

And in a recent interview she admitted she is keen to add to her tattoo collection at some point soon.

"I want to get another one, actually. I'd like a whole sleeve," she told the Radio Times magazine. "As you get older, I think it's a better and better idea."

Asked to describe her choice tattoo, The Queen star added, "Some sort of curving pattern running up my arm. Maybe a snake. I quite like snakes."