Nina Raine directs a cast that also now includes Alan Cox, Tom Georgeson and Mary Roscoe, joining the previously announced Jonathan Bailey, Natasha Little, Eve Ponsonby and Catrin Stewart.

When Kolia is invited to visit his oldest friends on their Estate in the country he anticipates a pleasant break from Moscow life. But as the comedy of provincial life plays out around him, he finds himself adrift in a sea of false expectations, missed opportunities and unspoken passions.

Glen, who appeared on Broadway in the transfer of the Donmar Warehouse's production of The Blue Room opposite Nicole Kidman in 1996, has more recently been seen on the London stage in the title role of Uncle Vanya (Print Room), Ghosts (the West End's Duchess Theatre) and The Crucible (which transferred from the RSC's Stratford-upon-Avon base to the West End's Gielgud Theatre). Film appearances includes "The Iron Lady," "Pope Joan" and "Harry Brown." TV appearances include "Game of Thrones" I & II (HB0), "Downton Abbey" (ITV) and "The Magdalen Martyr" and "Spooks."

Greig has recently finished the West End transfer of Jumpy from the Royal Court to the Duke of York's, also directed by Raine. Previous stage plays include Little Dog Laughed (Garrick), Gethsemene (NT), God of Carnage (Geilgud) and Much Ado About Nothing and King John (RSC). TV credits include "Episodes" and "White Heat" (BBC), :Black Books," "Green Wing" and "Friday Night Dinner" (Ch 4). She has played Debbie Aldridge in the radio series "The Archers" since 1991.

Sessions has been seen onstage in My Night With Reg (Royal Court/ Criterion), Waiting for Godot (Young Vic) and The Orton Diaries (NT). TV includes "Stella Street," "Gormenghast,: "Breaking the Mold" and "The History of Tom Jones" (BBC), "Porterhouse Blue "(Ch 4) and "The New Statesman". To book tickets, contact the box office on 020 7722 9301 or visit hampsteadtheatre.com for more details.