A good reference makes a big difference, especially with a face people already know.
Look for a sharp photograph with clear facial features, good lighting, and an expression you like. Movie stills, concert photographs, and promotional portraits can all be worth considering.
If you have several favorite images, send them over. We can compare the angles, lighting, and amount of detail before choosing a direction.
I wouldn’t recommend picking an image just because it’s famous. It also needs to work as a tattoo, at the size and placement you’re considering.
For more examples of portrait compositions beyond celebrities, you can explore my
Realistic Portrait Tattoos.