Three join 'Drugs' romantic comedy

Gabriel Macht, Hank Azaria, Oliver Platt in cast

Ed Zwick's "Love and Other Drugs" cast has swollen a bit further.

Gabriel Macht, Hank Azaria and Oliver Platt have signed on to the romantic comedy that Zwick is directing for Fox 2000/New Regency. They join Anne Hathaway, Jake Gyllenhaal, Judy Greer and Josh Gad.

Charles Randolph ("The Interpreter") wrote the script, formerly titled "Pharma," which he adapted from Jamie Reidy's nonfiction book "Hard Sell: The Evolution of a Viagra Salesman." Filming is scheduled to begin at the end of September.

Macht plays a hotshot Prozac salesman who's invovled romantically with Maggie (Hathaway), a free-spirited woman with Parkinson's disease who enters into a relationship with charming Viagra salesman Jamie (Gyllenhaal).

Azaria plays an unscrupulous doctor and client of Jamie's, and Platt plays his boss, a beleaguered pharmaceutical rep desperate to boost Jamie's sales.

Zwick and his Bedford Falls partner Marshall Herskovitz ("The Last Samurai," "Legends of the Fall") are producing with Scott Stuber, who originated the project. Randolph and Pieter Jan Brugge are producing, as well.

Macht, repped by ICM and Management 360, stars in the Warner Bros. thriller "Whiteout," which opened Friday. He next appears in the indie comedy "Middle Men."

Azaria, repped by WME and Sanders & Armstrong Management, recently appeared in Fox's "Night at the Museum: Battle of the Smithsonian" and Columbia's "Year One."

Platt, repped by WME and Mosaic, recently appeared in Universal's "Frost/Nixon" and "Year One." He has a role in Roland Emmerich's disaster epic "2012," which Sony will release Nov. 13.