Miley Cyrus Had the Cutest Birthday Message for Liam Hemsworth

These two could make even the most cynical people believe in love! Today is Liam Hemsworth's 28th birthday, and his longtime partner in crime, Miley Cyrus, had a super sweet message for the birthday boy.

Hemsworth and Cyrus first started dating way back in 2009, when the met on the set of The Last Song. Though they've had a few rough patches over the last nine years, the couple seems to be stronger than ever—they're happily engaged and, hopefully, planning a wedding!

In honor of her beau's 28th birthday, the "Malibu" songstress posted an adorable collection of images on Instagram, decorated with lots of birthday stickers. The pictures all feature her and Hemsworth—they're one good-looking couple!

Underneath the collage, she wrote, "Happiest birthday to my very best friend on the entire planet! I [love] you!"

Cyrus and Hemsworth are currently spending a little time Down Under, visiting his parents in Queensland, Australia. Yesterday, they were spotted holding hands as they left a lunch spot, looking quite in love, we might add!

During lunch with the Hemsworth clan, the birthday boy was treated to a rather unconventional cake. The Hunger Games actor shared a funny pic of a veggie-covered pizza that featured birthday candles! He wrote under the pic that it was a "perfect birthday...minus my dads hairy fingers diggin in my pizza."

It looks like Hemsworth had a birthday filled with family, good food, and lots of love—what more could you ask for?