Captain Hook was a bonafide villain in the classic Peter Pan story and play first written by J.M. Barrie. And judging by a recent tweet, it sounds like he’ll be on the side of evil in Once Upon a Time Season 2, too.

Robert Carlyle (Mr. Gold/Rumplestiltskin) recently tweeted, “Just finished 2 days work with @colinodonoghue1 A terrific actor giving a lovely performance as Capt Hook, Is it a Scots/Irish alliance?!?!?”

Uh oh! We don’t like the sound of anyone forming an alliance with Rumplestiltskin, even if Robert is simply referring to his Scottish heritage and actor Colin O’Donoghue’s Irish roots. But two days of filming together definitely suggests many scenes between Hook and Rumpel.

Colin tweeted earlier, “Finished a great first day as #CaptainHookon #ouat with @robertcarlyle_. The ship has set sail!!”

Before we fear an evil alliance, however, consider this OUAT Season 2 promo, which seems to show Hook breaking into Mr. Gold’s Storybrooke shop to retrieve his hook. Perhaps he’s not on Mr. Gold’s side after all?

Tell us your theories in the comments below!

Once Upon a Time Season 2 premieres on September 30, 2012 at 8 p.m. ET/PT on ABC.

Source: @robertcarlyle, @colinodonoghue1

Molly Friedman is an editor at Wetpaint Entertainment. Follow her on Twitter @MollyFriedman.

Want more OUAT news? Like us on Facebook and Follow us on Twitter.