Jacob Elordi Suntans Shirtless With Olivia Jade on Vacation

Here's a shirtless Jacob Elordi soaking up the sun with girlfriend Olivia Jade ... and the actor is showing off his great physique.

Jacob was kicking back in his swimming trunks on a chaise lounge next to his main squeeze, Olivia, who was wearing a bikini and lying back on her own recliner.

Jacob's hitting an e-cigarette and boning up on Jean Cocteau's book, "The Art of Cinema." Seems like he might be gearing up for another movie role.

As for Olivia, she's just playing with her phone and getting baked in the hot sun. The couple appear very comfortable together as everyone can see in the photos.

Jacob and Olivia are vacationing in Italy with her famous parents ... Lori Loughlin and Mossimo Giannulli ... so we haven't seen a lot of PDA from the couple.