Madison McLaughlin has appeared on "Supernatural" in the past, and she's headed to another CW series soon: The 20-year-old actress is set to debut on the currently unfolding fourth season of "Arrow," as revealed by series star Stephen Amell on Twitter. Exactly when she'll turn up and who she'll play is still unrevealed, something Amell had a bit of fun with in his post.

"Please welcome @MadisonMcLaugh to #Arrow," Amell wrote. "She plays (redacted) in ep (redacted) & is an expert tailgater in real life. So we're friends now."

No details have been confirmed on McLaughlin's role, but TV Line has connected the dots a bit into a credible educated guess: "McLaughlin seems to match a recent casting breakdown for 'Rebecca,' a teenage character who appears in Episode 19 -- with the potential to recur -- and is described as a 'smart, snarky' 'escapee of a dangerous cult.'"

At the current pace of "Arrow" season four, episode 19 will likely air in April. "Arrow" airs 8 p.m. Wednesdays on The CW.