in (someone's or something's) place
1. Literally, in someone's or something's physical location. Hey, you're in my place! You know I always sit here! You can't put the television in the sofa's place—it messes up the whole décor of the room!
2. Instead of someone or something else; as a substitute for someone or something. Janet is really sick, so I'm going to lead the meeting in her place. After our dog died, my parents got me a pet hamster in its place.