Princess Charlene's brother made a rare appearance to support the Princess of Monaco as Prince Albert stayed home.
On Saturday, the Princess of Monaco officially opened the 25th edition of No Finish Line Monaco, an event for which she serves as patron.
No Finish Line is a charity race where every kilometre completed is converted into a donation to benefit disadvantaged or sick children.
The event was established by the Jeune Chambre Économique of Monaco in 1999 to mark Monaco's first Children's Rights Day.
Charlene's brother makes rare appearance to support Princess of Monaco as Albert stays home
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This year, No Finish Line celebrates its 25th anniversary, running from November 16 to 24.
The other two traditional events, the 24-hour trophy and the eight-day race, will take place as usual.
Despite Prince Albert not attending, the Princess of Monaco was supported by her brother, Gareth Wittstock.
On Thursday, the Prince and Princess of Monaco joined forces as they took part in Monaco's annual Red Cross Christmas giveaway.
Princess Charlene officially opened the 25th edition of No Finish Line Monaco
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Charlene, 46, looked typically stylish in an off-white sleeveless blazer paired with sleek black trousers and a roll-neck blouse.
The festive outing came just days after Charlene opened up about life as an Olympian before she married into Monaco's Princely family.
The Zimbabwean-born royal was a successful swimmer before she retired from the professional sport in 2007.
Four years later, she tied the knot with her husband, Prince Albert II of Monaco.
Princess Charlene and Prince Albert attended the Red Cross Gifts Distribution earlier this week
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Princess Charlene was also joined by her brother, Gareth Wittstock
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"I walk, I cycle, I swim too, but not as much as before," she told Gala Magazine.
"I don't practise swimming as intensely as in the past. When I was young, I trained very hard, I challenged myself physically. These days, it's all about moderation."
Reflecting on her ambition and drive, Charlene made a heartbreaking admission: "It can be quite difficult because my nature is to want to beat records, win medals and surpass my limits.
"But, at nearly 47 years old, I can no longer do that… my body won’t let me. My spirit and my heart might, but my body says no!"
