Cf:
a) Every man's faults are written on their foreheads (Am.). Every one's faults are written in (on) their foreheads (Br.). Guilty conscience gives itself away (Br.)
b) The cat knows whose butter he has eaten (Br.). If the cap fits, put it on (Am.). If the cap fits, wear it (Am., Br.). If the the shoe fits, put it on (wear it) (Am.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.