He is best known for his portrayal of Jamie Maguire in the Channel 4's television series Shameless and Jim Hutton, Freddie Mercury's boyfriend, in the 2018 feature film Bohemian Rhapsody.
He appeared in Ultimate Force, The Bill and a TV adaptation of Jonathan Coe's novel The Rotters' Club.
[1] On 18 April 2016, he appeared as Wesley, an MI6 agent, on the American police drama Castle (episode: "Backstabber").
[3] In April 2009 McCusker married his long-term girlfriend, Jennie Sutton at Beamish Hall, a country house hotel.
He is also very good friends with ex footballer Michael O’Neill who also lives and went to the same school in McCuskers home town of Portadown[5]