Arzum began her career in 1992 as a model. She participated in the Miss Turkey contest in April 1993, and won the title. The same year in July, she represented her country at the Miss Europe beauty contest held in İstanbul, and was crowned Miss Europe 1993. She became the fifth Turkish beauty queen following Günseli Başar, Filiz Vural, Nazlı Deniz Kuruoğlu and Neşe Erberk.
Since 1997, she successfully played in a number of films, mini television series and commercials.
She speaks Turkish and English fluently.
- Yeni Bir Yıldız (1997)
- Sıcak Saatler (1998)
- Aşk ve Hüzün (2000)
- Merdoğlu (2000)
- Zeybek Ateşi (2002)
- Sahra (2004)
- Sessiz Firtina (2007)
- Kardelen (2008)
- Official Fan Page - Biography of Arzum Onan (Turkish)
- Arzum Onan at the Internet Movie Database
- DiziFilm.Com - Biography of Arzum Onan (Turkish)
- Who is who database - Biography of Arzum Onan (Turkish)
- HyperTV - News on Arzum Onan (Turkish)