The 'Real Pain' star beat out fellow nominees Jonathan Bailey, Yura Borisov, Edward Norton and Jeremy Strong for the coveted title.

Culkin was accepting his award for Outstanding Performance by a Male Actor in a Supporting Role, which he won for 2024’s “A Real Pain.”

Timothée Chalamet won the Screen Actors Guild award for best actor in a leading role for “A Complete Unknown,” upsetting Adrien Brody of “The Brutalist” just ahead of the Oscars. Brody had won a slew of precursor awards,

In “A Real Pain,” directed by Jesse Eisenberg (who also stars), Culkin plays Benji, a charismatic but troubled Jewish man on a Holocaust tour in Poland with his strait-laced cousin (Eisenberg) to honor their late grandmother’s memory.

Kieran Culkin had jokes at the 2025 SAG Awards. The star won the Screen Actors Guild Award for Male Actor in a Supporting Role in a Motion Picture for his role in “A Real Pain.” While onstage, he delivered a hilarious speech where he playfully roasted Adrien Brody and Jesse Eisenberg!

Kieran Culkin name-dropped Adrien Brody during his 2025 SAG Awards acceptance speech for his supporting role in 'A Real Pain'

At a bird-themed Thom Browne show this week, Brody told Vanity Fair he's "living in a pretty grateful state" after his Oscar nomination for The Brutalist.

Kieran Culkin is no stranger to awards show acceptance speeches — so he isn’t afraid to call out fellow actors for taking too much time on the podium. “Thank you for this incredibly heavy award,” Culkin said while accepting the SAG Award for male actor in a supporting role for “A Real Pain.

Kieran Culkin was sure to leave some laughs as he made a strange dig at Adrien Brody during his SAG Awards acceptance speech.