Reese Witherspoon reveals the unexpected name her son calls her instead of ‘mom’ - The ‘Legally Blonde’ actor shared the nickname in a recent social media video

While it's not what we'd call a secret, many fans never realized that Reese Witherspoon has branded herself around a stage name of sorts in her career, with several of her followers expressing disbelief after the actress dropped the bomb in a new video uploaded to Instagram.

Reese Witherspoon says she doesn't quite know how her youngest son came up with his nickname for her. In a social media post Wednesday, Witherspoon revealed her 12-year-old son Tennessee Toth calls her "Morty." The actress shared the video as part of a social media trend revealing what the people in her life call her.