Sydney Sweeney, 28, hit the streets of Los Angeles to promote her new lingerie company, Syrn (pronounced “siren”), in a showstopping public photo shoot posted to her Instagram. Sydney Sweeney poses in her new lingerie line, Syrn. Sydney Sweeney poses in her new lingerie line, Syrn, outside the United Artists Theatre. Instagram/@SyrnADVERTISEMENTIn another shot, the actress poses with her mouth open in a green, tiled bathroom. Sydney Sweeney poses in her new lingerie line, Syrn, in a bathroom.