Russell and Nina Westbrook decided to run it back on their vows … with the NBA superstar and his wife holding a beautiful ceremony aboard a boat in Italy!!

The NBA superstar and his longtime partner have been spotted enjoying their time together in Portofino this week … and as it turns out, it was to celebrate a very special occasion.

The Westbrooks — who got married at the Beverly Hills Hotel back in Aug. 2015 — held a vow renewal ceremony amid the getaway … and footage and pics of the event show them getting emotional as they professed their continued love for each other.

Russ and Nina wore lavish white outfits for the occasion … with the former electing to go with a shirtless look underneath his blazer, and the latter sporting a beautiful white dress — and a diamond ring to boot!!

Their closest friends and family were present … as well as some stringed musicians.

It looked fairy tale-esque with a ton of flowers directly behind them and the water served as a perfect backdrop as they poured their hearts out.

Russ and Nina have been together forever … and they have three kids together.