She's in a committed relationship with Spencer Ralston, who actually appeared as a Cloud 9 customer on the "Zephra Cares" episode in Season 5. Spencer is an actor, a writer, and a trainer. He's had guest spots on How I Met Your Mother (he played the grown-up version of Lily and Marshall's son, Marvin) and on 90210.

On April 13, 2021, Variety Magazine reported that Ash had inked an overall talent and development deal with NBCUniversal. She will also write a half-hour comedy pilot with Universal Television as part of her contract.

Lauren Ash looks and sounds like Jodie Foster.