The Dutch speed skater posted three pics of her and the YouTuber-turned-star-boxer in announcing their relationship status ... one of which showed the two holding hands on a boat.

Jake, meanwhile, threw up two photos of the couple on recent dates ... confirming their relationship as well.

"Im Dutch now," Paul wrote in his caption.

"That's it," Jutta said in hers.

Paul also shared a snap of the two on his IG stories Monday -- showing the couple cuddled up on a beach somewhere.

Of course, Paul was most recently linked to model Julia Rose until last year ... and Jutta previously dated fellow speed skater Koen Verweij.

We broke the story, 26-year-old Paul and 24-year-old Leerdam were spotted kissing on a dinner date in Miami last month ... but it was unclear if it was anything more than just two, hot young people enjoying each other's company.

Seems we've now got our answer ... and we're here for all of it!