E! was the first to report that Foster tied the knot with Hedison, a 44-year-old photographer based in Los Angeles.
Foster publicly came out in a rambling, heartfelt speech at the 2013 Golden Globe Awards, where the 51-year-old acknowledged longtime partner Cydney Bernard, with whom she has two sons. The couple ended their 20-year relationship in 2008.
Foster previously thanked her partner at other Hollywood events but kept her sexuality private.
E! says Foster and Hedison have been dating since last summer.