Libell Barthel is a German voice actress known for her work dubbing foreign-language films and television series into German. Her career in dubbing, or synchronization, is documented from the early 2000s to the 2010s. She is the niece of Petra Barthel, who is also active in the German dubbing industry.

Barthel has provided the German voice for a range of characters in both live-action and animated productions. Her voice roles include characters in major Hollywood films, such as the young Chloë Grace Moretz's character in Big Mamas Haus 2 and Jodelle Ferland's roles in Tideland and Silent Hill. She also lent her voice to animated projects, including the character Viper in Kung Fu Panda - Die Geheimnisse der furiosen Fünf.

Within the realm of anime, Barthel is recognized for two significant roles. She voiced the character Miyuki Konno, the younger sister of the protagonist, in the acclaimed film The Girl Who Leapt Through Time (2006). She also provided the German voice for the character Saya in the television series Moribito - Guardian of the Spirit (2007). These performances form the core of her known work in anime dubbing. Her broader career encompasses over twenty documented speaking roles in film and television up to the year 2012.