United Kingdom, June 18 -- Macaulay Culkin wishes he could've spent even more time with Brenda Song.

The 45-year-old actor has been in a relationship with Brenda, 38, since 2017, but in a new anniversary post, Macaulay admits that he wishes they met much sooner.

Alongside a photo of them together, he wrote on Instagram: "Today marks a very special day for me. It's been 9 years since my life changed forever. 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.

"Thank you for my everything. (sic)"

Meanwhile, Brenda previously admitted that she sometimes forgets to "take care of [herself]".

The actress - who h...