Consider this brilliant scene:
A: Do you like my dress?
B: Yes, it’s beautiful.
Imagine you’re playing the role of B. And that is your only line in the entire show.
The “obvious” choice is that B thinks A’s dress is beautiful. It’s the obvious choice, and it’s also the least interesting choice.
What if B is telling the truth? Are there interesting ways for B to tell the truth? Of course!
If you only have one line in a show, the director’s probably not going to spend a lot of time with you to develop your character, but that doesn’t mean you shouldn’t have one.
Interesting choices – they don’t require a huge shift in performance, nor should they draw focus from the scene, but the interesting choice makes everything on stage more three-dimensional.
There’s no such thing as a small role, just small choices. Make big choices. Make interesting choices.