Actor Sam Rockwell poses after winning the Best Supporting Actor award for his role in "Three Billboards outside Ebbing, Missouri" at press room of the 90th Academy Awards at the Dolby Theater in Los Angeles, the United States, on March 4, 2018. (Xinhua/Li Ying)

LOS ANGELES, March 4 (Xinhua) -- Sam Rockwell received Best Supporting Actor at the 90th Academy Awards for his role in "Three Billboards Outside Ebbing, Missouri" on Sunday.

Rockwell, portraying "Three Billboards Outside Ebbing, Missouri" dim-witted, racist cop with anger management issues, garnered widespread acclaim and earned him numerous accolades, including the Golden Globe Award for Best Supporting Actor -- Motion Picture and Screen Actors Guild Award for Outstanding Performance by a Male Actor in a Supporting Role before the Oscars this year.

This is the first Oscar win for Rockwell.

"I'd like to thank the Academy, never thought I'd say those words," he said in his acceptance speech.