Use "walk-on part" in a sentence

1. I’d moved here to act (which after two years of walk-on parts in industrials was depressing in its own right), but also because of Julia, my high-school girlfriend, whom I’d already followed to college

2. Marilyn had a brief walk-on part in a sketch—it was just a way for Brokaw to get some televised footage in order to possibly secure future bookings for her