A teacher at Luttrelstown Community College has been chosen as one of the six leaders on RTE’s Operation Transformation, which begins next week.

Siobhan O’Brien (30), who lives in Clonsilla, was selected from hundreds of hopefuls for the reality series which will see her share her weight loss journey with the nation.

Secondary school teacher Siobhan grew up in a close-knit family in Clonshaugh and is the youngest of three girls.

She said she felt like a hypocrite telling students about the importance of healthy living and exercise when she was neglecting her own fitness.

Revealing that the teenagers did not take her seriously, she added: “We’re pushing wellbeing in the school at the minute so I wanted to show how to do it – so the students can be part of the journey as well.

“The students are part of the reason that I applied.”

Growing up, Siobhan was always sporty and involved in everything in her community from Irish dancing to football. She represented Ireland in Taekwondo.

But in the seven years since leaving college her weight fluctuated and she says she wants to get fit again so she can be a good influence on the young adults in her charge.

Her mum Rita, dad Joe and the rest of her family and friends are 100% behind her as she reveals her ambitious target – to run the Dublin City Marathon.

Siobhan, who is the youngest assistant principal in the country, will join four other leaders as they take part in the twelfth series of the show which will be broadcast for the first time from Bremore Castle in Balbriggan.

Over the course of the eight weeks, OT experts will attempt to get the whole town of Balbriggan moving, with local community leaders reporting back on their success in getting their area active.

A show spokesperson said: “We want Balbriggan to show the nation what can be achieved with the help of a strong community and civic leaders.”

Operation Transformation starts on RTE One next Wednesday, January 9.