She studied archeology when she was crowned in 1982 as Miss Switzerland. In the 1982 Miss Universe election, she finished fourth. Since 1989 she works as a television presenter. So she hosted in 1989, the Euro Vision Song Contest. She leads by large galas, such as Golden Rose of Montreux. Morena became known in Germany in 1992 by her relationship with Lothar Matthäus. In 1994 the couple married, son Loris was born in 1992. The marriage ended in divorce in 1999.
Morena speaks English, Italian, French and German. For several years she moderated the Télévision Suisse Romande in French-speaking Switzerland. Also in television of the French-speaking Switzerland (TSR ), it plays a major role in the sitcom Les pique- Meuron. As Fernsehpräsentatorin it advocates for the waiver of fur as a fashion accessory and supports the Swiss Animal Protection.
In 1990, she starred opposite Walter Roderer in the feature film The double Nötzli.