E! confirmed the news too, noting Song was photographed out in Beverly Hills wearing a massive diamond engagement ring.

Song and Culkin welcomed their first child together, son Dakota, in April 2021. The two have kept their relationship largely private.

But in August 2020, Song offered rare insight into their dynamic, posting an adorable birthday tribute to her partner to mark his 40th birthday.

“Happy 40th birthday to this magical being,” she wrote. “I could sit here and write endlessly about how wonderful, kind, loving, genuine, loyal, honest, brilliant and hilarious you are, and how grateful I am that I get to share and do this life thing with you. But firstly, that would take me an eternity and secondly, you won’t even see this because you don’t ever use instagram. Hahaha. My unicorn that I never thought could exist, I am luckiest person in the world because I am loved by you.”

Culkin spoke to Esquire for its March 2020 issue about his hopes of having a family with Song. “We practice a lot,” he said. “We’re figuring it out, making the timing work. Because nothing turns you on more than when your lady comes into the room and says, ‘Honey, I’m ovulating.’”

Song spoke about Culkin in the profile too, telling Esquire, “People don’t realize how incredibly kind and loyal and sweet and smart he is. Truly what makes Mack so special is that he is so unapologetically Mack. He knows who he is, and he’s 100 percent okay with that. And that to me is an incredibly sexy quality. He’s worked really hard to be the person he is.”