Fashion designers and actresses Ashley and Mary-Kate Olsen plan to work the cash registers for part of the September 10 launch of their pop-up store in New York City. During New York Fashion Week, the two are opening a pop-up branch of their brand Elizabeth+James in the West Village. From 7 to 8 p.m. on September, they plan to ring up customers themselves.

Elizabeth+James is one of the Olsen’s three fashion industry labels, the other two being The Row, and Olsenboye. Elizabeth+James is named after the twins’ brother and sister and contains a lot of ankle boots, oversized shirts, and belted waistlines.