Tate Donovan and legit regulars Josh Hamilton and David Pittu are among the thesps lined up to appear in the Off Broadway bow of “Medieval Play,” the latest by Kenneth Lonergan.

Donovan, who starred last year in the Rialto staging of “Good People,” and fellow cast member Heather Burns (“Bored to Death”) both worked previously with Lonergan on the 2001 Off Broadway preem of his play “Lobby Hero.” Hamilton (“The Coast of Utopia”) and another thesp in “Medieval Play,” Anthony Arkin, appeared in Lonergan’s 2000 outing “The Waverly Gallery.”

Pittu (“CQ/CX”) and Kevin Geer also are on board for “Medieval,” with further casting to be locked in.

Longergan will write and direct the show, a comedy about a pair of 14th century French knights seeking redemption during the decline of chivalry. Production bows at Signature Theater as part of the theater’s Residency Five program of world premiere plays by writers in residence. Two more plays by Lonergan will premiere in future Signature seasons.

“Medieval Play” begins previews May 15 ahead of a June 7 opening at the Irene Diamond Stage, one of the three auditoriums housed in the Signature’s newly completed midtown venue.