Rachel Bilson apologizes to her The O.C. co-star Tate Donovan for 'being an a**hole' on set

Rachel Bilson dons baggy dress and pigtails for coffee run in Santa Monica

Rachel Bilson says there was no drama on The O.C. set in the beginning

Rachel Bilson and Rami Malek are 'all good' after their Instagram drama over an old snap went viral