Edit the following sentence to remove the incorrect grammar: "My sister and I filmed a movie together last Sunday."
The sentence "My sister and I filmed a movie together last Sunday" is grammatically correct and does not need to be edited.
Complete the following task based on the instruction and optional input provided.### Instruction:
Edit the following sentence to remove the incorrect grammar: "My sister and I filmed a movie together last Sunday."

### Output:
The sentence "My sister and I filmed a movie together last Sunday" is grammatically correct and does not need to be edited.