Lisa Vicari (born February 11, 1997) is a German actress. She is best known for portraying Martha Nielsen in the TV show Dark. She is also known for portraying the lead role of Isi in Isi & Ossi, a Netflix original movie.
Vicari was born in Munich in 1997. At the age of ten, she took an improvisational theatre course and shortly thereafter appeared in her first short film, Tunnelblicke. In 2010, she acted in the children's film Hanni & Nanni. The following year, she played Leonie in the post-apocalyptic film Hell. In 2017, Vicari starred as the title character in the Khaled Kaissar film Luna, in which she plays a teenager whose father is secretly a Russian agent and whose family is being wiped out before her eyes. Since 2017, she has portrayed Martha Nielsen, the love interest of Jonas and sister of the missing Mikkel in the Netflix science fiction series Dark. Vicari studies media science in Potsdam.