double as someone—(of an actor) act the part of two characters in the same play:
- Peck doubled as the hearty Yorkshireman and the sinister Sir Mulberry Hawk in “Nicholas Nickleby.”
double for someone—act as a replacement for a person who is ill, on holiday, etc.:
- I was just a stuntman on the film, but I doubled for the head villain himself, Mr. Suzuki.