He has recorded a hit song, "La Chica Marita", and is a spokesperson for PETA (People for the Ethical Treatment of Animals).

He had a well-reported romance with Pamela Anderson, another PETA supporter, and lived with her for a while in Malibu, but the relationship later ended.

He speaks fluently in Swedish, English, Dutch, Italian and French.

Marcus is currently working on a perfume line, workout video, jewelery line and upcoming movie shoots.