The Buffy the Vampire Slayer star, 47, kicked off the birthday post for Prinze with a black-and-white photo of the pair kissing at their wedding, her arm wrapped around him as they smooched. Related: ...

"22 @realfreddieprinze,” and adding a few wedding-themed emojis: “🥂💍👰🏼.” Related: 20 Adorable Throwback Photos from Sarah Michelle Gellar and Freddie Prinze Jr.'s Early Days ...