The teenage son of Norway's Crown Princess Mette-Marit celebrates his 19th birthday Wednesday

By Caris Davis
Updated January 13, 2016 04:00 PM
Credit: Mark Cuthbert/UK Press/Getty

Surfs up for Marius Borg Hoiby!

The teenage son of Norway’s Crown Princess Mette-Marit celebrates his 19th birthday Wednesday – and the active royal is no doubt planning for another year filled with sun, surf, girls and a few four-legged friends.

Marius, who is an avid social media user, recently posed for a holiday portrait alongside his mother, 42, as part of the extended Norwegian royal family.

The Norwegian court has adopted Marius, whose dad is Mette-Marit’s ex, advertising exec Morten Borg, 47, as one of their own.

But one look at his popular Tumblr account gives a little insight into the teen’s personal life.

From skateboarding to surfing, Marius is always on the go.

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But he’s no stranger to an adventurous ride on a motorbike.

The hot royal, who sports a tattoo on his left wrist, also enjoys the guitar and has no shortage of gal-pals!

Just your typical teenage guy. Happy birthday, Marius!