MacLachlan, who will make his Broadway debut with the play, was seen last year on the London stage opposite Woody Harrelson (The Rainmaker) in On an Average Day at the Comedy Theatre. The actor is known for his big and small screen work in "Blue Velvet," "Twin Peaks," "Showgirls," and the 2000 update of "Hamlet" with Ethan Hawke.
Irish-born Gillen broke stateside with a turn in the cable drama "Queer as Folk." The actor — who will also make his Broadway debut — has appeared on London's Almeida Theatre stage in productions of Platonov, The Tempest and The Playboy of the Western World. He was also seen in the films "Shanghai Knights" and "The Low Down."
Director David Jones — who helmed Pinter's No Man's Land for Roundabout in 1994 with Christopher Plummer and Jason Robards— is slated to direct the work, which explores the relationship between two brothers when a vagabond enters their lives.
Roundabout saw a revival of Harold Pinter's Betrayal with Juliette Binoche and Liev Schreiber in their 2000-2001 season. The company will return to the playwright's canon with The Caretaker. The new staging is expected to play the American Airlines Theatre in the fall.
The original Broadway staging of the work opened in 1961 at the Lyceum Theatre starring Alan Bates, Donald Pleasence and Robert Shaw. In 1986, Chicago's Steppenwolf Theatre brought their revival of the play to New York, with Gary Sinise, Jeff Perry and Alan Wilder under the direction of John Malkovich.