Rachel Bilson Has Family Fun

Rachel Bilson goes shopping at Target for Halloween gear with half sister Hattie Bilson, stepmother Heather Medway and toddler half sister Rosemary Bilson in search of a costume and other items on Tuesday (October 6) in Glendale, Calif.

The 28-year-old actress has been cast in the 100th episode of How I Met Your Mother, it was reported last week. Also on the episode will be Project Runway mentor Tim Gunn.

On Monday, Rachel was spotted at the modern office building Tribeca West in Santa Monica, Calif.

10+ pictures inside of Rachel Bilson having family fun…