Hynden Walch (born February 1, 1971) is an American voice actress and singer who is known for her voice roles as Elsie in Stanley (2001 to 2003), Starfire in both Teen Titans (2003 to 2006) and Teen Titans Go! (since 2013), Princess Bubblegum in Adventure Time (2010 to 2018) and Summer Hugglemonster in Henry Hugglemonster (2013 to 2016).
Early in her career, Walch appeared in live action productions, playing the recurring role of Mae Capone in The Untouchables (1993 to 1994) in addition to appearing in Groundhog Day (1993) and Jerry Maguire (1996).
In ChalkZone, she does the voice of Penny Sanchez, notable for being one of her earliest voice roles.