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
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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.

Want to keep up with the latest royals coverage? Click here to subscribe to the Royals Newsletter.http://mariusborghoiby.tumblr.com/post/109519669099/surf

But he’s no stranger to an adventurous ride on a motorbike. http://mariusborghoiby.tumblr.com/post/124870142414

The hot royal, who sports a tattoo on his left wrist, also enjoys the guitar and has no shortage of gal-pals! http://mariusborghoiby.tumblr.com/post/133458351489

Just your typical teenage guy. Happy birthday, Marius!