[3] In 2019, Naslen started his film career by playing the character of Melvin in the movie Thanneer Mathan Dinangal.

[5] In the same year he did the role of Charles Oliver Twist in the film Home which was also released in Amazon Prime.

[8][9] Anna Mathews of Times Of India wrote about his performance in the film, "The young actor Naslen, as usual, even in a small role, he manages to stand out and be goofily loveable.

"[10] In 2024, he played Sachin Santhosh in the movie Premalu, produced by Dileesh Pothan, Fahadh Faasil and Syam Pushkaran.

The movie was among the top grossing Malayalam films, with total ₹136 crore box office collections worldwide.