Why Tanya Reynolds Left Sex Education

And then there's Tanya Reynolds, who plays the eccentric Lily. Lily and Ola were a couple for all of Season 3, though Lily's love for writing alien-erotica seemed to put their relationship in jeopardy briefly before they reconciled in the Season 3 finale.

During an appearance on "Capital Xtra Breakfast" radio program, Tanya Reynolds confirmed that she would not be returning to "Sex Education," and said that she felt it was an understandable decision to not bring her back. "It's just the natural progression of these shows," she said, "when you have such big ensemble casts and so many characters, I think you have to let a few older characters go to make way for newer ones, which is absolutely the right thing, the way it should happen" (via RadioTimes.com).

Reynolds also said that she thought that three seasons was just about right for Lily's arc on the show, and that she loved her time as a member of the cast. She has gone on to star in the Channel 4 comedy "I Hate You" next to newcomer Melissa Saint (via The Guardian).