be a dead ringer for

US /bi ə dɛd ˈrɪŋər fɔr/
UK /bi ə dɛd ˈrɪŋər fɔr/
"be a dead ringer for" picture
1.

長得一模一樣, 酷似

to look exactly like someone else

:
She could be a dead ringer for her grandmother when she was young.
她年輕時可能她奶奶長得一模一樣
That actor is a dead ringer for my old high school teacher.
那個演員長得和我高中時的老師一模一樣