Kristen Stewart all smiles at Paris Fashion Week

"Twilight" star Kristen Stewart was all smiles as she arrived at a fashion show in Paris Thursday morning, following her reported reconciliation with longtime boyfriend Robert Pattinson, her co-star in the more than $2 billion movie franchise.

Stewart, 22, arrived in high spirits at the Spring/Summer 2013 Balenciaga show during Paris Fashion Week, in marked contrast to her frequently dour expression on red carpets, RadarOnline.com said Thursday. The actress, who sat in the front row next to Vogue editor-in-chief Anna Wintour, is the face of Balenciaga's new fall fragrance, Florabotanica, The Los Angeles Times reported.

Us Weekly said Wednesday that Pattinson, 26, and Stewart are once again living together, as they had until Stewart's brief fling with her married "Snow White and the Huntsman" director, Rupert Sanders, 41.