New casting has been confirmed for Barney’s Version — adding Scott Speedman, Bruce Greenwood and Macha Grenon to the already-stacked cast of the Robert Lantos project.

Speedman (Adoration) has been cast in the best friend role, putting him alongside star Paul Giamatti. Grenon (Familia) will play another close friend, while Greenwood (Star Trek) appears as Blair, a love rival.

The cast also includes Dustin Hoffman, Minnie Driver, Rosamund Pike and Rachelle Lefevre.

Speedman is represented by Brian Swardstrom from WME Entertainment, Greenwood is repped by Chuck Binder of Binder & Associates and Gernon is with the Ginette Achim Agency represented by Ginette Achim.

Deirdre Bowen the casting director for the film, assisted by Nina Gold in London, Teresa Razzauti in Rome, Andrea Kenyon in Montreal and Pam Dixon in L.A. Shooting on the adaptation of the Mordecai Richler novel starts next month in Rome.