The youngest of the U.S. pop sensation The Jonas Brothers was treading the boards at London's Queen's Theatre where he will be playing the part of Marius for the next three weeks.
And he had the love and backing of his older brothers Kevin and Joe as well as their parents Denise and Paul and younger brother Frankie, as they all jetted into the capital to cheer him on.
He made his first appearance in the show, one of the longest-running in the West End, as Marius Pontmercy, a second-generation baron who falls in love with Cosette, played by Camilla Kerslake, 21, Gary Barlow's prodigy who was also making her debut.
And he was given a standing ovation by the audience as his proud brothers looked on.
It had been a nerve-wracking evening for the 17-year-old, who said that learning a different style of music took some getting used to.
Speaking to ITN before the show, he said: 'It's a lot different. It's not just the stage elements but the style of singing.
'There's pop music and then there's theatrical style music and I'm just getting used to that mind set.
'And trying to re-learn how to sing like that has been interesting and a lot of fun as well.'
Not that Nick is a stranger to the show, having played the character Gavroche in the New York production just before it closed in 2003, when he was only nine years old.
He has also previously starred in numerous Broadway shows including A Christmas Carol in 2000, Annie Get Your Gun in 2001, and Beauty and the Beast in 2002,
And he shared his joy at landing the role of Marius with his fans via his page on the social-networking site Twitter.
He wrote: 'Can't wait to see the fans who make it out to the show! Love you all. Special thanks to Cameron [Mackintosh] for this amazing opportunity.'
Cameron Mackintosh of course being the producer of the show and the man who brought Nick to the West End.
Speaking to the Daily Mail last month, he said: 'I went up to him at the closing night party in New York and told him he was terrific and hoped that he would one day return to play Marius.
We've been in touch a lot and, of course, since then he has become this world-famous star.
'He and his father and I agreed that it would be great if he came and played Marius here in London. He has bent over backwards to fit it all into his schedule.'
But it is Nick's pop career as one third of the Jonas Brothers that he is most famous for, and one where he has performed to thousands of screaming girls around the globe.
And his Les Miserables stint will see fans packing into the theatre for a glimpse of their idol, with some arriving early to see him and his brothers arriving backstage.
But Nick said he wasn't worried that the audience would be filled with screaming girls and said: 'I believe they'll be respectful and they'll know the code of conduct at the theatre. Even if they do scream, it will just add to the excitement of the night.'
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