2015 saw Gleeson appear in four films, all of which received Oscar nominations.
His first release of the year was the science fiction psychological thriller Ex Machina, which was filmed at a hotel in Valldalen, Norway in the summer of 2013 and released in January 2015.
The film stars Gleeson as a programmer who wins a competition to visit the home of his company's CEO (Oscar Isaac) and test the human qualities of the artificially intelligent humanoid robot Ava, who is played by Alicia Vikander.
The film was the directorial debut of Never Let Me Go and Dredd screenwriter Alex Garland and their third collaboration.
Ex Machina was met with critical acclaim for its performances, screenplay, direction, and visual effects.
In the romantic period drama Brooklyn, he appeared in a supporting role as a romantic interest of Saoirse Ronan's character, a young Irish woman living in Brooklyn in the 1950s.
Gleeson was announced to be a part of the Star Wars sequel trilogy in April 2014.
The first instalment, Star Wars: The Force Awakens, was released in December 2015.
Gleeson plays the ruthless General Hux, commander of the First Order's Starkiller Base.
Throughout the film, Hux is vying for power with First Order commander Kylo Ren, who is portrayed by Adam Driver.
In his last release of the year, Gleeson co-starred in Alejandro G. Iñárritu's western The Revenant as fur trader Andrew Henry, with Leonardo DiCaprio portraying fur trapper Hugh Glass.
Alongside his brother Brian and his father Brendan, Gleeson starred in a revival of the Enda Walsh play The Walworth Farce from January to February 2015.
In February 2016, Gleeson narrated the BBC Two nature documentary series Earth's Greatest Spectacles.

Gleeson played fashion house Burberry's founder, Thomas Burberry, in a short Christmas-themed advertisement film for the company in 2016.
He made a guest appearance on the Channel 4 sitcom Catastrophe as a recruitment consultant in March 2017.
Gleeson then played fictional CIA agent Monty Schafer in American Made, released in September 2017, starring Tom Cruise as drug smuggler Barry Seal.
Also in September, Gleeson had a small role in Darren Aronofsky's psychological horror film Mother!,
starred alongside Christina Applegate and Thomas Haden Church in the independent comedy Crash Pad, and portrayed Winnie-the-Pooh creator A. A. Milne in the biographical film Goodbye Christopher Robin.
His portrayal of Milne was deemed as being played a "little too stiffly" by BBC critic Nicholas Barber.
Gleeson reprised his role as General Hux in Star Wars: The Last Jedi, released in December 2017.

In his first film of 2018, Gleeson co-starred as National Lampoon magazine co-founder and writer Henry Beard in the biographical comedy A Futile and Stupid Gesture, opposite Will Forte as the magazine's co-founder Doug Kenney.
Gleeson next starred in Peter Rabbit (2018) – based on the stories of the character of the same by Beatrix Potter – as Thomas McGregor, the great-grandnephew and heir to Mr. McGregor.
The adaptation received a mixed reception from critics, although Deadline Hollywood critic Pete Hammond praised "an appealing Gleeson" for "overcoming the unlikable aspects of Thomas".
The film fared better at the box office, grossing over $350 million globally.
Gleeson starred alongside his brother and father in the short film Psychic, which was directed by the latter and premiered in 2018 on Sky Arts.

Also in 2018, Gleeson starred in the supernatural thriller The Little Stranger, with Ruth Wilson.
The story concerns a country doctor (Gleeson) who takes on a patient living in a possibly haunted old estate, where he falls in love with the owner's youngest daughter (Wilson).
It was Gleeson's second collaboration with director Lenny Abrahamson, following Frank.
He next featured in a supporting role in the crime drama The Kitchen (2019) as an intense Vietnam War veteran who becomes a hitman for the Irish Mob.

In late 2019, Gleeson returned to the role of General Hux in Star Wars: The Rise of Skywalker, the last film of the nine movie series.
2015 saw Gleeson appear in four films, all of which received Oscar nominations. His first release of the year was the science fiction psychological thriller Ex Machina, which was filmed at a hotel in Valldalen, Norway in the summer of 2013 and released in January 2015. The film stars Gleeson as a programmer who wins a competition to visit the home of his company's CEO (Oscar Isaac) and test the human qualities of the artificially intelligent humanoid robot Ava, who is played by Alicia Vikander. The film was the directorial debut of Never Let Me Go and Dredd screenwriter Alex Garland and their third collaboration. Ex Machina was met with critical acclaim for its performances, screenplay, direction, and visual effects. In the romantic period drama Brooklyn, he appeared in a supporting role as a romantic interest of Saoirse Ronan's character, a young Irish woman living in Brooklyn in the 1950s. Gleeson was announced to be a part of the Star Wars sequel trilogy in April 2014. The first instalment, Star Wars: The Force Awakens, was released in December 2015. Gleeson plays the ruthless General Hux, commander of the First Order's Starkiller Base. Throughout the film, Hux is vying for power with First Order commander Kylo Ren, who is portrayed by Adam Driver. In his last release of the year, Gleeson co-starred in Alejandro G. Iñárritu's western The Revenant as fur trader Andrew Henry, with Leonardo DiCaprio portraying fur trapper Hugh Glass. Alongside his brother Brian and his father Brendan, Gleeson starred in a revival of the Enda Walsh play The Walworth Farce from January to February 2015. In February 2016, Gleeson narrated the BBC Two nature documentary series Earth's Greatest Spectacles.
Gleeson played fashion house Burberry's founder, Thomas Burberry, in a short Christmas-themed advertisement film for the company in 2016. He made a guest appearance on the Channel 4 sitcom Catastrophe as a recruitment consultant in March 2017. Gleeson then played fictional CIA agent Monty Schafer in American Made, released in September 2017, starring Tom Cruise as drug smuggler Barry Seal. Also in September, Gleeson had a small role in Darren Aronofsky's psychological horror film Mother!, starred alongside Christina Applegate and Thomas Haden Church in the independent comedy Crash Pad, and portrayed Winnie-the-Pooh creator A. A. Milne in the biographical film Goodbye Christopher Robin. His portrayal of Milne was deemed as being played a "little too stiffly" by BBC critic Nicholas Barber. Gleeson reprised his role as General Hux in Star Wars: The Last Jedi, released in December 2017.
In his first film of 2018, Gleeson co-starred as National Lampoon magazine co-founder and writer Henry Beard in the biographical comedy A Futile and Stupid Gesture, opposite Will Forte as the magazine's co-founder Doug Kenney. Gleeson next starred in Peter Rabbit (2018) – based on the stories of the character of the same by Beatrix Potter – as Thomas McGregor, the great-grandnephew and heir to Mr. McGregor. The adaptation received a mixed reception from critics, although Deadline Hollywood critic Pete Hammond praised "an appealing Gleeson" for "overcoming the unlikable aspects of Thomas". The film fared better at the box office, grossing over $350 million globally. Gleeson starred alongside his brother and father in the short film Psychic, which was directed by the latter and premiered in 2018 on Sky Arts.
Also in 2018, Gleeson starred in the supernatural thriller The Little Stranger, with Ruth Wilson. The story concerns a country doctor (Gleeson) who takes on a patient living in a possibly haunted old estate, where he falls in love with the owner's youngest daughter (Wilson). It was Gleeson's second collaboration with director Lenny Abrahamson, following Frank. He next featured in a supporting role in the crime drama The Kitchen (2019) as an intense Vietnam War veteran who becomes a hitman for the Irish Mob.
In late 2019, Gleeson returned to the role of General Hux in Star Wars: The Rise of Skywalker, the last film of the nine movie series.
Domhnall Gleeson