The German runner, who is frequently praised as the sexiest athlete in the world by her supporters, looked bold in a black outfit.
When Schmidt, 24, posted two pictures to her Instagram story, she dazzled in her skin-tight attire.
Her 4.5 million Instagram followers went crazy when they noticed that the dress also featured a large split across her calf.
She just wrote in the captions, "Went to the opera yesterday evening."
Schmidt has been a busy week because she also debuted her own clothes line with Hugo Boss.
Boss posted two images of the athlete wearing her new gear along with an Instagram announcement of the cooperation.
"Sleek, sporty, and intelligent," the caption stated. Your heart will race when you see the new BOSS x Alica Schmidt collection.
Schmidt is wearing a baggy green suit and a brown zip-up shirt in the image. Alica published a set of athletic clothing from the line on her own Instagram account.