When discussing his score for London Has Fallen and working with director Babak Najafi, Morris says,
"When I started to collaborate with Babak, the process was instant and effortless. It really felt like we had worked together on many movies before this, despite having just met. Babak has a very immediate response to music and how it works with the narrative. I would send him scenes or reels, and get the e-mail back from him: 'You made me very happy today.' As a composer, that's the moment, that's the reward for me in my process: knowing that you told a great story through music, and that you and your director are in sync."
Morris has composed the music for more than 15 feature films, 25 prime-time television series and 5 interactive game titles. He is largely known for his period TV work on such shows as The Tudors, The Borgias and, presently, Vikings; the first two earned him Emmy Awards for Outstanding Original Main Title Theme Music. He is currently working on Of Kings and Prophets for ABC as well as Emerald City for NBC. He recently completed the third installment of the Dragon Age video game franchise for EA, which was awarded Video Game of the Year in 2015. Morris also conducts his own scores, including London Has Fallen, at the iconic Abbey Road studios in London.