Rupert Grint is to make his Broadway debut.

The 'Harry Potter' actor - who made his professional stage debut playing a drug dealer in 'Mojo' in London's West End last year - has joined the cast of 'It's Only a Play', which officially opens in New York's theatre district on October 9.

The 25-year-old actor will join previously-announced cast members Matthew Broderick, Nathan Lane, F. Murray Abraham, Stockard Channing, Megan Mullally and Micah Stock in the production, which will be staged at the Gerald Schoenfeld Theatre.

The play is set at a Broadway producer's Manhattan townhouse during the opening-night party for a nervous playwright's newest work.

Rupert will play acclaimed theatre director Frank Finger, while Matthew stars as the writer and Nathan is his bitter best friend, a resentful television actor who secretly wants his pal to fail.

Tom Kirdahy, Roy Furman and Ken Davenport are lead producers on the revival, which will be directed by Jack O'Brien.

Rupert previously revealed starring in 'Mojo' had made him eager to work more in theatre.

He said: ''It's opened my eyes; I've learned so much.''