Harry Potter star Evanna Lynch is taking tonight's semi-final of Dancing with the Stars in the US in her stride, telling Ryan Tubridy on RTÉ Radio 1 that while she has found it hard competing against "big personalities" on the show, "there's something that resonates with some people of me being my normal, grounded, somewhat-more-quiet self".

Evanna Lynch and professional partner Keo Motsepe

The actress, from Termonfeckin, Co Louth, and professional partner Keo Motsepe will perform two routines tonight in their bid to avoid the double elimination and secure one of the four places in next week's Dancing with the Stars final.

Last week saw Lynch and Motsepe receive a perfect score of 30 from judges Carrie Ann Inaba, Len Goodman and Bruno Tonioli for their Rumba. 

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"I love dancing and I've always been like, 'Please, can I be on that show?'," she told Tubridy on his RTÉ Radio 1 show on Monday morning. "So it just kind of worked out this year. I got a week's notice and came over and I couldn't wait to jump in."

"I danced a lot when I was a teenager," Lynch continued. "A little known fact, I'm actually a failed dancer, because I wanted to be a dancer rather than an actor. But I didn't really have the technique because I'd spent a few years doing the Harry Potter films and I wasn't really focused. So anyway, this was kind of my chance to revisit that love and expand it." 

The conversation then turned to youth mental health and how introverts can feel excluded, with Lynch emphasising that "introverts have their own strengths too". 

"I've actually found it hard on this show too, which is big personalities, extroverts," she admitted. "And a lot of people said to me starting out, 'Oh, you're going to have to come out of your shell. You're going to have to be less shy'.

"You know, I didn't really. I didn't have to change anything. I'm still here; I'm still in the semi-final. There's something that resonates with some people of me being my normal, grounded, somewhat-more-quiet self."

Lynch was joined on the show by her father Donal, describing him as "the most enthusiastic publicist I've ever had".

Listen to the interview in full here