be a dead ringer for
US /bi ə dɛd ˈrɪŋər fɔr/
UK /bi ə dɛd ˈrɪŋər fɔr/

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.
她年輕時可能和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。