On the April 22 episode of Cosmo Goes Deep, Song told Running Point co-star Kate Hudson that the couple’s tiniest disputes erupt during impromptu Mario Kart matches in bed. What starts as playful competition can turn into mild annoyance when one cuts the other off or snatches a last‑second win.
Song recalled that she and Culkin met through a mutual friend in 2017 and that their romance developed unexpectedly — a quality she’s said strengthened their bond. The pair became engaged in 2022 after years together.