Riverdale's KJ Apa and Cole Sprouse get wet and wild during male bonding vacation in New Zealand

Riverdale star KJ Apa got wet and wild in Lake Wakatipu while vacationing in his native New Zealand over the New Year.

The half-Samoan, half-Kiwi 21-year-old was joined in the summery South Island by his shirtless castmate Cole Sprouse.

Apa not only bonded with the Italian-born, Cali-raised 26-year-old in the water, he also taught him some rugby moves on a field.  However, the Friends alum - who played Ross' (David Schwimmer) son - didn't seem too familiar with New Zealand's national sport.

KJ (born Keneti James) and Cole brought along Matthieu Olo-Whaanga, Boston Ridge, and Blair Huston for some outdoorsy male-bonding organized by Fortis Events. While visiting home, the Hate U Give heartthrob also cuddled up to his sister Timēna's pet Chihuahua whom he called 'my tiny son.'The adventure-filled bromance continued with a helicopter tour, a mechanical bull ride at Cowboys Bar, and the Hidden Valley Festival.