Pretty Little Liars' end date is not set in stone.

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The ABC Family series is scheduled to air through season 7, but fans and actors alike believe the adventures of Hanna (Ashley Benson), Emily (Shay Mitchell), Aria (Lucy Hale), Spencer (Troian Bellisario), and Alison (Sasha Pieterse) could last well beyond the current order.

Now that filming for season 6 is nearing its conclusion, Mitchell has voiced her opinions on the series' final goodbye. As far as she is concerned, Pretty Little Liars could continue forever.

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"I honestly don't know -- until we're the 'Golden Girls?'" Mitchell joked when asked how much longer the Rosewood drama could continue, according to CBS. "I'm having so much fun and it's a great journey that all of us get to be on."

The protagonists' high school (and college!) days are behind them, and the winter premiere will place the Liars in a whole new light. Now that the actors are no longer tasked with playing characters nearly a decade their junior, the series could conceivably run indefinably, or until the mysteries run out.

Perhaps PLL's newest baddie will be its last. Mitchell teased post-A problems while speaking with CBS.

"All the girls kind of go their own separate ways for five years and when they come back, they come back to Rosewood," Mitchell explained. "I think that's what the big mystery is about -- what is it that's bringing all these girls back?"

Find out more when Pretty Little Liars returns to ABC Family this January with "Of Late I Think of Rosewood." See a preview below.

Tags: pretty little liars television ABC Family