Leokadia Serafinowicz was an artist and promoter of Polish puppet theater and Theater for Young Audiences (TYA). She was a puppeteer, director, scenographer, and a writer of scenarios as well as theater and film adaptations. She served as director and art director at the Teatr Lalki i Aktora (Actor and Puppet Theater) "Marcinek" in Poznań from 1960 to 1976, making it one of the most prestigious puppet theaters of its time. She was a co-founder and the first president of ASSITEJ Poland (1981–1982), and an honorary member of UNIMA (from 2000). She died on 24 November 2007 in Puszczykowo, Poland.