Nominees in the category included Jonathan Bailey, Yura Borisov, Kieran Culkin, Edward Norton and Jeremy Strong

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

Expect the unexpected with a Kieran Culkin speech. The “Succession” star, 42, won the SAG Award for outstanding performance by a male actor in a supporting role for “A Real Pain” on Sunday, and during his speech he randomly called out Adrien Brody.