Rachel Bilson has the ITCH

Female fun day!

Brunette beauty Rachel Bilson seems to have gotten a major itch, picking up anti-itch medication Cortizone from CVS while out her half-sister Hattie.

The 25-year-old former O.C. actress (donning Chloe sunglasses) spent all day Thursday babysitting Hattie in L.A. The pair started the day off eating breakfast bagels at “Western Bagel” with one of Rachel‘s gal pals.

Rachel (she really loves her quilted Chanel handbags!) then took Hattie to meet up with another female friend and picked up a few sweets at “See’s Candies” and tested out lotions at “Beauty Essentials.”

Just last week, Hayden Christensen and Rachel were spotted feeding each other lunch and picking up groceries together.

For 20+ more pictures of Rachel and Hattie‘s day together, CLICK HERE!