The "Lord of the Rings" star celebrated his big day on Monday (January 13), and to honour her fiance, the "Teenage Dream" singer shared a series of Instagram photos of him standing in front of The Great Pyramid of Giza during a recent trip to Egypt.
"Many people wonder how the pyramids were actually built... but me, I am in constant awe and wonder of how such a loving/kind/compassionate/supportive/talented/deeply spiritual/did I mention incredibly good looking/James Bond of a human being can actually exist in the flesh!" Perry wrote in a caption.
"There's a reason why all animals and children run straight into his arms... It's his heart, so pure. I love you Orlando Jonathan Blanchard Copeland Bloom. Happiest 43rd year."
Orlando replied with his own vow of love, writing in response: "Ready to climb all them pyramids and mountains with you," and signing off with a heart emoji.
Orlando, who split from supermodel ex-wife Miranda Kerr in 2013, proposed to Katy, 35, last year (19).