Fill somebody’s shoes/boots
Definition 1 of 1
Pro Tip 1/3Big Responsibility
Suggests stepping into a role with high expectations or reputation to uphold. 
The new CEO must fill her predecessor's shoes and keep the company successful.
Pro Tip 2/3Emotional Impact
Used when the predecessor was well-loved or admired, indicating a challenging transition. 
She has to fill her father's shoes at the charity, which meant a lot to him.
Pro Tip 3/3Metaphorical Shoes
Remind learners this phrase is metaphorical and isn't about literal shoes. 
Even though they're different, he has to fill his shoes as team captain.