Flashing her pearly whites (not to mention her engagement ring), Rachel Bilson was spotted en route to a business meeting in Hollywood today (September 2).

Battling the sun and heat in linen pants, a billowy tank top and funky shades, the 28-year-old actress cut a stylish figure as she tended to her afternoon errands.

Meanwhile, Rachel will be pulling up a chair next to Nina Garcia in this Thursday’s episode of Project Runway. No word on what this week’s challenge might be. How to dress diminutive paparazzi magnets perhaps?