Riverton was born Esther Tonia Riggin in Columbus, Ohio on November 22, 1977.
She grew up in Carmel, Indiana, where she attended the Park Tudor School.
In 1999, she graduated cum laude and Phi Beta Kappa from Harvard University.
In 2007, she married David Alpert at a beach wedding in Fiji.
Her work includes producing and starring in the 2006 film Red Doors.