The 'Real Pain' star beat out fellow nominees Jonathan Bailey, Yura Borisov, Edward Norton and Jeremy Strong for the coveted ...
Presenter Kathryn Hahn accepted the award on behalf of the actor, who is starring in 'Glengarry Glen Ross,' which opens next month on Broadway.
A Real Pain' is a story about family, connection and healing - with a performance that could see Kieran Culkin adding an Oscar to his collection.