Once Upon a Time adds Jane the Virgin star in mystery role 

has tapped Alison Fernandez for a mysterious role in the upcoming season 6 finale, EW has learned exclusively.

The actress, who played a younger version of the titular character on

, will appear in the season finale, with potential for more episodes should the show be renewed for season 7.

Cast Reveals Favorite Memories From Shooting the Pilot

Details on her role are being kept under wraps, but TVLine recently reported that the ABC fairy tale drama was looking to cast two roles in the finale: a formerly hopeful-turned-cynical leading man and a mischievous 10-year-old. Fernandez would seem to fit the latter role, while the recently cast

alum Andrew J. West would fill the former — though we have a theory on that character.

1 \'Nashville\' casts Rachel Bilson as series regular

2 \'Game of Thrones\' season 7 premiere date, teaser revealed

3 David Boreanaz reflects on \'Buffy\': \'I was in the right spot at the right time\'

4 \'Better Call Saul\' season 3 trailer offers new footage of Gus

5 Allison Williams, Samuel L. Jackson disagree on erections in sex scenes