Another day, another Once Upon a Time Season 2 guest star. So who's the newest name to be added to the ever-growing roster of fresh faces coming up in the rest of the season?

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According to the London Theatrical, actress Lesley Nicol will be be joining OUAT for a guest role. Most American viewers probably know Lesley from her role as Mrs. Patmore, the harried cook in Downton Abbey.

We don't know what her part on OUAT will be, but we do know she already has at least one fan on the set: Josh Dallas (David Nolan/Prince Charming)! He tweeted about the news, saying, "As a Huge #DowntonAbbey Fan I'm very excited [Lesley Nicol] is coming to #OnceUponaTime!"

As for who she might be playing, Lesley herself teased, "Think servant maybe," but also noted she's not Mrs. Potts from Beauty and the Beast.

Hmmm....

Read more OUAT spoilers here.

Once Upon a Time Season 2 returns on Sunday, January 6, 2013 at 8 p.m. ET/PT on ABC.

Source: @londontheatric, @joshdallas, @lesley_nicol, @lesley_nicol

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.