[4] After completing high school, he moved, as well as his brothers before him, to the United States and City College in Los Angeles, where they all trained as actors.

[5] In his first movie from the same year, the short film Rampljus (Stage Lights), which is about an unemployed actor in Helsingborg, he collaborated with his brother Baker.

Also Karim's next movie The Apple Tree (2003), which is about two African brothers struggling in chilly Sweden, was nominated in Cannes.

He was also included in the 2006 set at the Fredriksdalsteatern in Herrskap och tjänstehjon where he played Florindo Al Dente in the 19th century Venice.

[9][10] He has also had roles in films such as the Johan Falk series, Double Play, Dying of the Light, and Zero Dark Thirty.

[12][4] In June 2021, Karim and best-selling author Camilla Läckberg released an audiobook based on their co-written script Glacier.