Adam Thomas has reportedly signed up to return to Waterloo Road for its upcoming revival.
The school-set drama originally aired on the BBC between 2009 and 2015 but will return for a new series in 2022 to help fill the void left by Holby City, which has been axed after 23 years.
Thomas starred as bad boy pupil Donte Charles in the first four series - but when he returns in series 11, it will be as a teacher.
A source told The Sun: "It's been top secret for a while but Adam is over-the-moon to be going back to Waterloo Road.
"It's where it all started for him and he was really excited when it was announced the show would be coming back.
"Of course Adam was thrilled to be asked to return and didn't hesitate in saying yes. It's something he's made no secret of and made it clear to bosses he was eager to do. He's overjoyed it's finally happening!"
Waterloo Road is expected to return to the BBC One schedules after Holby City bows out next March.