Liza Miller is a fictional character from the television series Younger, which aired from 2015 to 2021. She is portrayed by actress Sutton Foster and is a 40-year-old woman who pretends to be in her 20s to secure a job in the competitive publishing industry. Liza's journey explores themes of identity, ambition, and the challenges of navigating both personal and professional life. Throughout the series, Liza forms relationships with various characters, including her best friend Kelsey Peters, played by Hilary Duff, and her boss Diana Trout, portrayed by Miriam Shor. The show highlights Liza's struggles and triumphs as she balances her secret life with her desire to succeed in a youthful environment.