"Happy 10 year anniversary my love," the 26-year-old wrote. "Good to see everyone is as dumb as they were in 2009! Some things never change .... & I hope the way you feel about me is one of them. Yours truly."
Miley then posted a screenshot to her Instagram story of her and the Aussie hunk kissing on the set of The Last Song, with the caption "June 2009".
Miley ended her touching anniversary post with yet another vintage throwback.
"Started diggin you in 2009 @liamhemsworth. S**t got deep. 💍 Happy anniversary."
Liam Hemsworth and the Malibu singer met and fell in love on the set of The Last Song, a movie adaption of the teen romance novel by Nicholas Sparks.