11:47 AM PT -- Some good news ... Nevin's sister just posted, saying, "My sister and James are okay, they got lost on their hike but made it back to their car and are on their way back to the resort now. Thank you everyone for reposting and helping us reach Nevin."
11:23 AM PT -- A source involved in the investigation tells us the vehicle has not yet been located.
"Days of Our Lives" actor James Lastovic and his roommate have gone missing in Hawaii, according to his mother, who's pleading for help.
James' mom, Lucienne, says her son and Nevin Dizdari were vacationing at a resort in Kauai. On Sunday they told someone on the staff at the Hanalei Bay Resort they were headed for Kokee State Park where they were going to take a long trail hike. They also asked for directions to Shipwreck Beach ... specifically around the cliff diving area.
According to Lucienne, they never returned to the resort Sunday night and haven't been seen since. They left all their belongings in the room, which are now in the possession of the police.