Vlasta Pospíšilová (1935) has during studying specialized on puppet-leading and stage designing. In 1956, she enrolled as an animator in the studio of puppet film in Prague, where Jiři Trnka was preparing a feature animated film A Midsummer Night's Dream. With his artistic guidance, she acquired professional skills that she used in all her following films. In the late 1970s she started to direct puppet animation films. In the 1990s she created 30 episodes for the puppet animated serial Fireflies.