Before Joss Whedon developed Buffy into an iconic television series, the idea was turned into a movie starring Kristy Swanson and the late Luke Perry. Since Ben Affleck plays a basketball coach now for Gavin O’Connor’s The Way Back, he was asked to recall his time in the role, and laughed at himself a bit while doing so. Speaking to SiriusXM, Affleck said,
Article source: https://www.cinemablend.com/news/2491502/ben-affleck-admits-his-buffy-the-vampire-slayer-performance-was-so-bad-his-line-was-dubbed