fill someone’s shoes

US /fɪl ˈsʌm.wʌnz ʃuːz/
UK /fɪl ˈsʌm.wʌnz ʃuːz/
"fill someone’s shoes" picture
1.

to take someone's place and do their job or duties as well as they did, especially when that person was very good at their job

:
It will be hard to fill his shoes after he retires; he was an exceptional leader.
No one can truly fill her shoes as the head of the department.