Derry Girls fans went wild when he made a cameo appearance as a police officer in the series three premiere episode.
And Liam Neeson showed off his playful side as he posed with Jamie-Lee O’Donnell in an amusing behind-the-scenes snap shared to Instagram on Wednesday.
In the picture, the Hollywood star, 69, gave a pout as he posed in his character’s black police officer uniform and put his arm around the Irish actress.
Pouting: Liam Neeson showed off his playful side as he posed with Jamie-Lee O’Donnell in an amusing behind-the-scenes snap from Derry Girls shared to Instagram on Wednesday
Jamie, 30, also pursed her lips as she embodied her sassy character Michelle in a striped T-shirt dress, a denim jacket and a teal satin baseball jacket.
She completed her chic ensemble with a pair of over-the-knee navy socks and Michelle’s signature silver hoop earrings.
In a caption alongside the photograph, Jamie quipped: ‘Serious Acting.’
Liam, who was born in Ballymena, is a huge fan of the Northern Irish comedy, which returned this week for its third and final season.
A Derry special guest star! Fans of the Northern Irish comedy went wild after the Hollywood A-lister, 69, made a cameo appearance as the show returned for its third and final season
The Taken star was introduced to the hit show by his pal Helen Mirren, according to the Daily Mail’s Eden Confidential column.
Fans of Derry Girls were left completely surprised when Liam appeared in this week’s premiere episode as Chief Constable Byers.
Byers questioned Northern Irish schoolfriends Erin, Orla, Clare, Michelle and James after they were caught on school grounds after hours.
Viewers were open-mouthed in shock as Liam slowly emerged from the shadows of the police station, with one tweeting: ‘Liam Neeson’s cameo in #DerryGirls was the best surprise ever! Absolutely love this show.’
A-list talent: Viewers were open-mouthed in shock as Liam played a small part as local police officer Chief Constable Byers
Another posted: ‘Everyone screaming ‘OMG it’s Liam Neeson’ at the telly.’
A third added: ‘The gasps out of everyone when Liam Neeson came on screen #DerryGirls.’
Liam said he was ‘delighted’ to play ‘a wee part’ in the show, adding: ‘I’m a huge fan of the series, the talented Lisa McGee’s incredible writing and the superb ensemble cast.’
‘It’s such a unique and special show with real heart and amazing to see the lives of ordinary, funny people living in Northern Ireland during The Troubles played out in a Channel 4 comedy. It was lovely to be back filming there and having fun with them all.’
The third series of the comedy about a group of Catholic schoolfriends was met with rave met with rave five-star reviews from critics, including MailOnline’s Christopher Stevens who said it was ‘wonderful’.
Impressed: Neeson said he was ‘delighted’ to play ‘a wee part’ in the show, while fans were equally over the moon by his role as Byers
Fans were equally effusive, with one tweeting: ‘#DerryGirls really is the best thing to have been on the telly in a long time, isn’t it. Spent the episode absolutely creasing myself laughing despite being in the room on my own watching it. Brilliant.’
Another posted: ‘That episode of #DerryGirls was absolutely one of the best of the entire series.’
The show opened with Erin (Saoirse-Monica Jackson), her cousin Orla (Louisa Harland) and friends Clare (Nicola Coughlan), Michelle (Jamie-Lee O’Donnell) and Michelle’s cousin James (Dylan Llewellyn) contemplating life on the eve of their GCSE results.
They bumped into Sister Michael (Siobhan McSweeney), their straight-talking headmistress, who told them she had already seen their results and ‘to enjoy what time they have left’.
The comment sent the friends into a spin as they questioned if they’re going to be grounded, thrown out of school, or need to run away from home.
Under the spotlight: Byers questioned Northern Irish schoolfriends (left to right) Orla, Clare, Erin, Michelle and James after they were caught on school grounds after hours
‘Let’s just wait until tomorrow and see what we’re dealing with,’ urged James.
‘Or, we can see what we’re dealing with tonight,’ said Michelle.
The gang proceeded to break into the school and unwittingly helped two thieves steal computers before they were cornered by police and brought into the local station.
There to question them was Chief Constable Byers (Neeson) who asked why the schoolfriends were in the grounds of the school in a hilarious exchange, before they invited their uncle Colm (Kevin McAleer) to speak to the police.
Fighting fire with fire: The group brought in their uncle Colm (Kevin McAleer) when the officers asked if they wanted to phone a parent. Colm talked the police into submission
Finally, after being talked into submission by Colm, Byers and his colleagues had a breakthrough and dismissed the group.
‘For the love of sufferin’ Jesus, take him with you,’ he said, in a line that proved a hit with viewers.
The following day the group arrived at school to collect their GCSE results and all learned they had passed.
‘I didn’t say you’d failed,’ said Sister Michael, smiling at their surprise. ‘I’d implied you’d failed.’
Results day: The episode ends with the group going into school to collect their GCSE results