Monaco's Prince Albert is to marry his long-term girlfriend - according to reports.

According to Royalist.com, wedding rumors were sparked after Albert's lover, swimmer Charlene Wittstock, was spotted shopping for an engagement ring.

The speculations were further fueled after the 48-year-old royal brought the South African beauty - 20 years his junior - to prestigious Monaco Automobile Club's gala recently.

The annual event is popular with Monaco's rich and famous and was also attended by the country's Principality's Minister of State, Jean-Paul Proust.

Albert officially introduced his stunning companion to the official guest and, soon after the Olympic athlete was spotted shaking hands with the Archbishop of Monaco, Bernard Barsi.

More information at exposay.com.