Former Xena: Warrior Princess star Lucy Lawless has signed on for a mysterious role in Season 2 of ABC's Marvel's Agents of S.H.I.E.L.D..

No details were given for her character, and it isn't known if she is only appearing in one episode, or if she is taking on a multi-episode arc. Lucy Lawless is the first new character to sign on for Season 2, joining series regulars Clark Gregg (Phil Coulson), Ming-Na Wen (Melinda May), Brett Dalton (Grant Ward), Chloe Bennet (Skye), Iain De Caestecker (Leo Fitz) and Elizabeth Henstridge (Jemma Simmons).

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We reported earlier this month that Marvel's Agents of S.H.I.E.L.D. is coming to Comic-Con 2014, with a panel on Friday, July 25 from 3:00 PM to 4:00 PM in Ballroom 20. The show returns for its second season on Tuesday, September 23 in its new time at 9 PM ET on ABC.

Lucy Lawless most recently starred in the NBC sitcom Parks and Recreation, where she plays Diane Lewis, the new wife of Ron Swanson (Nick Offerman).