Song shares two children with the 'Succession' star's older brother Macaulay Culkin
The actress and fiancé of Kieran's older brother Macaulay Culkin congratulated the Succession star in a heartwarming post Monday night after he won outstanding lead actor in a drama series at the Emmy Awards.
“Yay Kieran!!!!!!!” Song, 35, wrote on her Instagram Story as she reposted a photo of Kieran, 41, initially shared by Rolling Stone declaring him the Emmy winner.
Song’s excited reaction comes after Kieran edged out costars Brian Cox and Jeremy Strong to the trophy, along with fellow nominees Jeff Bridges from The Old Man, Better Call Saul star Bob Odenkirk and Pedro Pascal of The Last of Us.
The actor’s latest accolade comes after a victorious award season so far, having also won awards at this year’s Golden Globe Awards and Critics' Choice Awards for his role as Roman Roy on Succession, which concluded last May.
Song got engaged to Kieran’s brother Macaulay, 43, in January 2022 after four years of dating, a source told PEOPLE at the time. The pair met in Thailand on the set of Changeland and were first linked in July 2017.
In December, Song was pictured wearing a wedding band as she attended the wedding of her Dollface costar Kat Dennings on Nov. 27, in a photo published by Vogue on Instagram. She posed with Macaulay as she sported a wishbone ring encrusted with diamonds across the band.
Reps for the couple did not immediately respond to PEOPLE's request for comment at the time.
Song was spotted wearing the same ring days earlier as she came out to support Macaulay at his Hollywood Walk of Fame ceremony, along with their two boys, in their first public appearance as a family.
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Macaulay called Song his “champion” in an emotional speech at the ceremony as he paid tribute to her and their kids.
"You are absolutely everything," he said at the time. "You're the only person happier for me today than I am. You're not only the best woman I've ever know, you're the best person I've ever known. You've given me all my purpose. You've given me family.”
“After the birth of our two boys, you've become one of my three favorite people," he added.
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