Williams splashed onto the big screen for the first time in 1994's Lassie. She also started landing roles on television shows such as "Step by Step" and "Home Improvement." In 1995, she played a memorable part in Species and continued in the horror vein with Halloween: H20 in 1998. Next up was the mordant comedy Dick (1999), followed by her breakthrough role on the TV series "Dawson's Creek."
Among the star's other notable films are A Thousand Acres (1997), Prozac Nation (2001) and Brokeback Mountain (2005), which netted Williams an Oscar nomination. Her work in 2010's Blue Valentine earned her Independent Spirit, Golden Globe and Academy Award nods.