(NYTIMES) - Matthew Lewis' face is everywhere.

On the wall to his right, grinning on a poster for the 2012 West End revival of Our Boys, a play by Jonathan Lewis. In the alcove behind him, arms crossed and stony-faced in a group shot for Harry Potter And The Order Of The Phoenix (2007). And in front of his laptop camera, eyes widening beneath his grey flat cap and dark brown hair as he explains the seemingly self-promoting background. "It's not my house," the 31-year-old actor said.

He and his wife were paying a Christmas Eve visit to his parents in Leeds, the Yorkshire city 200 miles north of London where he was born, he explained. But he had overlooked the fact that their home's study is, well, a shrine to him.

"They're very proud," he said, as if wishing for nothing more than an Invisibility Cloak. But bashfulness is no longer necessary for the man who for a decade played the fumbling, stammering Neville Longbottom in the Harry Potter films.

Last year, he had spent time in the nearby Yorkshire Dales, not far from Leeds, filming his role as Hugh Hulton, a wealthy landowner and rival suitor to veterinarian James Herriot (Nicholas Ralph) for the affections of a farmer's daughter, Helen Alderson (Rachel Shenton), in the reboot of All Creatures Great And Small, which is available in Singapore on BBC First (StarHub TV Channel 502) and BBC Player.

The series, which is based on James Alfred Wight's beloved books inspired by his adventures as a young veterinarian in 1930s Yorkshire, was a surprise hit when it premiered in Britain last September.

Celebrated as an emotional balm for pandemic-weary viewers, it became Channel 5's highest-rated show since 2016, and has been renewed for a second season.

For fans who were used to Lewis as the clumsy Longbottom, his entrance at the end of the second episode comes as a shock. A decade removed from the last Potter film - he no longer looks like Draco Malfoy's awkward, chubby-cheeked punching bag - his career has been moving away from that type of character for a while.

"It wasn't necessarily a conscious decision," he said. "I've just been lucky that those are the roles I was offered."

His first post-Potter role was as Jamie Bradley, a 22-year-old retail worker who dabbled in drugs and crime but tried to turn his life around, in the BBC drama The Syndicate in 2012, followed by a self-centred fitness fanatic in Me Before You in 2016 and a single dad under house arrest in Girlfriends in 2018.

Off-screen, he shot a shirtless cover for Attitude magazine's swimwear issue in 2015 that left J.K. Rowling scolding him on Twitter: "warn me next time, for God's sake".

"There was very intense pressure coming off of Harry Potter," he said. "I didn't want to be known as a one-trick pony."

Lewis is the latest Potter actor to find success on television recently.

Rupert Grint plays one of the four leads on the Apple TV+ series Servant (2019 to present), an M. Night Shyamalan psychological thriller. Daniel Radcliffe, Harry Potter himself, is an executive producer and star of the TBS comedy Miracle Workers (2019 to present).

But Lewis is still coming to terms with being a leading man - God forbid, a sexy one. Which is why, when the opportunity came to audition for All Creatures Great And Small, he hesitated.

"The original series is a bit of an institution in Yorkshire and my dad really wanted me to do it," he said. "But this guy is supposed to be very dark and handsome, and it has to be believable that Helen's in love with him. I was like, 'I don't know about this. When I shave, everyone will see I look like I'm about 12.'"

Even after he got the part, he still did not think he was in the clear. "I was dreading turning up the first day on set," he said. "I was sure they'd be like: 'This is what he actually looks like? We need to recast this guy.'"

But the series director, Brian Percival, who directed several episodes of the Emmy-winning drama Downton Abbey (2010 to 2015), was well aware of Lewis' previous work on the Potter films - and felt sure he had the experience, confidence and Yorkshire accent needed to pull off the part of Hugh.

"I like to cast actors who can relate in some real and tangible way to the characters they are playing," he said. "Hugh needs to have an air of natural confidence that is born of privilege, and Matthew achieved that incredibly well."

Lewis said he struggles with roles that are too similar to his own life. "I find it quite difficult when too much of me starts to come through in a character," he said. "It's easier when I can play someone completely different, like a police officer in London or someone who's wealthy."

Which is why he finds it difficult to re-watch the Harry Potter films. "At times it's painful how much of me there is in Neville," he said. "When I'm watching, I'm like, 'That's not Neville; that's you.'"

But despite Lewis' surging heartthrob status, his older brother Anthony said he was still a big nerd. He plans pub quizzes for family on all the holidays, including one for that evening.

"He's fiercely competitive," Anthony Lewis said, "to the point of being obsessive. It can be quite intense and is incredibly annoying."

But if "former Harry Potter actor" is the label that follows him for the rest of his career, well, Lewis said, that would be okay with him.

"If there's something people remember you by, there are worse things than the Harry Potter franchise," he said.

"It opened so many doors for me when I otherwise wouldn't even have gotten in the room."

All Creatures Great And Small is available on BBC First (StarHub TV Channel 502) and BBC Player.