Jon Foster is an American actor and musician. His films include the drama The Door in the Floor (2004), the horror film Stay Alive (2006), the thriller Brotherhood (2010), and the drama Rampart (2011). Foster is a co-founder of the electronic-soul duo Kaneholler, with his wife, Chelsea Tyler who is the daughter of musician and singer Steven Tyler.

The Door in the Floor is a 2004 American drama film written and directed by Tod Williams. The screenplay is based on the first third of the 1998 novel A Widow for One Year by John Irving.