Josh O’Connor’s been grinding since "The Crown" -- but now he’s pressing pause for some seaside smooches with his GF, Alison Oliver.

Catch these pics -- Josh and Alison couldn’t keep their hands off each other, locking lips and diving into full-on romance during a steamy escape in Portofino, Italy over the weekend.

The sun was scorching -- and so was their chemistry. Josh couldn’t take his eyes off Alison, who stunned in a chic bikini, totally carefree and soaking up the love.

When Josh finally tore his eyes off Alison, he took a dip to cool down -- and let’s just say, he had to make a quick adjustment to his royal jewels mid-swim.