Kaley Cuoco is celebrating a relationship milestone, but not without a few laughs.

The Flight Attendant star took to her Instagram to celebrate her five-year anniversary with her husband Karl Cook. 

"Happy 5 years to the weirdest person I know!" she wrote alongside a black-and-white photo of herself and Karl sharing some PDA with face coverings on. "I don't remember a moment before you entered my life.. what a boring life that must have been! I love you @mrtankcook !"