Pamela Anderson -- Call Me Countessa ... I'm Royalty Now (PHOTO)

Pamela Anderson was down on both knees last night ... and it was an honor.

The former Baywatch star was in Genoa, Italy where she was officially named "Countessa de' Gigli." Anderson was honored for her work protecting marine life. She's also creating a partnership with The Italian Mediterranean Sealife Association.

The deed was carried out by Prince Stephan of Montenegro. We're told Pam will share her new royal title with her two sons Brandon and Dylan, who also became honorary knights.

And to all a good knight.