Sigh! Heard and Musk go public with their romance

Amber Heard and Elon Musk let the world know that they are more than just friends by showing some PDA on social media Sunday.

Heard, 30, and Musk, 45, posted similar Instagram photos of the two of them together at a restaurant in Australia, looking cozy and with Musk sporting a discernible lipstick smooch mark on his cheek.

Heard, whose nasty divorce from Johnny Depp, 53, was finalized in January, is in Australia filming “Aquaman.”

She and the billionaire Tesla boss were photographed on Sunday walking arm-in-arm while visiting a Gold Coast wildlife sanctuary.

They were first linked last summer but most reports have suggested the relationship was platonic.

Musk, who is worth an estimated $14 billion, just got out of a second marriage to British actress Talulah Riley, 31.