Freddie Prinze Jr. and Sarah Michelle Gellar.Photo: Sarah Michelle Gellar/Instagram

Freddie Prinze Jr., Sarah Michelle Gellar

Sarah Michelle Gellaris celebrating another trip around the sun forFreddie Prinze Jr.

TheBuffy the Vampire Slayeractress, 44, marked her husband of 19 years' 46th birthday on Instagram Tuesday, sharing a glowing selfie of the pair.

She also noted the significance ofInternational Women’s Day, praising Prinze, “It completely makes sense that you share that day, as there is no man that is a bigger champion and friend to women than you.”

“I couldn’t think of someone better to raise a daughter with or to teach a son, what it truly means to be a good man. Happy birthday FP,” she concludedher sweet tribute.

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human-interest stories.

Freddie Prinze Jr.Sarah Michelle Gellar/Instagram

Freddie Prinze Jr.

In the second slide on her post, Gellar shared a black-and-white image of her beau flashing a smile as he sat in front of a celebratory dessert, complete with a candle.

Gellar also posted a video toher Instagram Storyof her gift to Prinze: a Miyabi kitchen knife.

“Use it wisely,” she wrote, tagging his Instagram account.

RELATED VIDEO: Sarah Michelle Gellar and Freddie Prinze Jr. on Splitting Chores, Raising Kids and Their Love Story

Gellar and Prinze met while filming the 1997 horror hitI Know What You Did Last Summer, and wed in 2002. They share two children: sonRocky, 9, and daughter Charlotte, 12.

The paircelebrated their 19th wedding anniversarythis past September. In an Instagram post, the actress candidly confessed she mixed up their big day and thanked the media for “alerting my#momsquad” who then reminded her.

“I honestly thought it was tomorrow,” Gellar joked, sharing ablack-and-white photofrom their 2002 nuptials. “Happy anniversary@realfreddieprinzetoday, tomorrow and any day after that I think might be our anniversary in the future.”

Jen Juneau

source: people.com