Inspired by his father, Vikström has played roles in theatre productions starting on stage at the Stockholm theatre "Folkan" in 1990. During 1991 he starred as the main-character in the opera "Hoffmans adventure" in Stockholm. He also played the main part as "John" in the musical "Miss Saigon" from late 1997 to December 1998. He is now the singer in Swedish symphonic metal band Therion. Also, he is the vocalist for the Argentine-based band Enlighted.