The star is best known for her role as Marissa Cooper on Fox television series The OC, and quickly became famed for her sense of style.
She has since branched out into the fashion industry, most recently with the launch of her own boutique in the trendy area of Spitafields in London.
Here the actress and designer shares her top five beauty essentials with us.
Elemis Melting Cleansing Gel, Harvey Nichols Dundrum, €27
Oribe Dry Texturizing Spray - Purse Size Format Compact, available to purchase online uk.spacenk.com £18
Balenciaga Paris Eau de Toilette, Brown Thomas from €55.90
Ren Clean Bio Active Skincare - Clear Calm 3 Clarity Restoring mask - blemish prone - www.renskincare.com, €35
By Terry - Balme de Rose - Nutri Regenerating, available to purchase online uk.spacenk.com, £35