Celebrating nine years of dating, Macaulay Culkin posted a sweet tribute to his partner Brenda Song.

The 45-year-old actor took to Instagram and posted a heartwarming photo of himself and the 38-year-old actress, posing outdoors in matching pink outfits.

"Today marks a very special day for me. It’s been 9 years since my life changed forever," he wrote in the sweet post.

"It’s amazing to think that 1 in every 5 days I’ve been alive I have had the honor of waking up next to the love of my life. My only regret is that we haven’t had more time together," he added. "Thank you for my everything."

Fans were thrilled to see their relationship flourish as they stormed the comment section with their well wishes, with one saying, "This relationship is my hopecore, actually."

"I pray this will last forever for them," another wrote.

"I’m so glad that you two found each other," a third said. 

The former child stars two children together, Dakota, 5, and Carson, who was born in 2022.

Their engagement was confirmed by PEOPLE back in January 2022, around nine months after the birth of their first son.

Their relationship began in 2017, when they met on the set of Changeland.