“Happy Birthday to my beautiful Sofia!” the 44-year-old actor captioned the post.
“This amazing woman makes me laugh out loud every single day. Here’s to taking down oysters all over the world! I love you very much!”
“Can’t wait. I love you!” Pernas responded in the comments section.
The birthday post comes days after Hartley’s ex-wife Chrishell Stause and boss Jason Oppenheim went public with their relationship.
The “This Is Us” actor and Pernas reportedly tied the knot in May.
The “Selling Sunset” star and her boss Oppenheim confirmed their new relationship with a photo shared Wednesday to Instagram. Stause and Oppenheim have been enjoying a vacation in Rome.