Siobhan J. Fallon Hogan (born May 13, 1961) is an American actress and comedian from Syracuse, New York. She began her career in television roles from the early 1980s to 1990s, including roles on Saturday Night Live and Seinfeld.

In 1994, Fallon made her film debut in 'Only You'. She has since had roles in a number of films including 'Forrest Gump' (1994), 'Men in Black' (1997), 'Dancer in the Dark' (2000), 'Holes' (2003), 'Daddy Day Care' (2003), 'Dogville' (2003), 'Funny Games' (2007), 'We Need to Talk About Kevin' (2011) and 'The House That Jack Built' (2018).