临时演员用地道的英语该怎么说

临时演员

[词典] extra; walker-on;

[例句]上一年，阿道夫森在一部戏剧里担任主角，当时英格丽在剧中还只是个临时演员。

The previous year Adolphson had starred in a play in which Ingrid had been an extra