Newly minted Gulfstream Pictures has hired a trio of execs to work on development and production — Josie Rosen as exec VP of development and production and Margaret Chernin and Matt Phelps as creative executives.

Move comes five months after Mike Karz and Bill Bindley launched Gulfstream as a production and financing banner, with an exclusive first-look deal at Warner Bros. to co-finance films and a development fund from Korean 3D firm Redrover and a consortium of U.S. private equity funds. Gulfstream plans to produce and co-finance two films per year.

Rosen has worked at Karz Entertainment where she headed development and oveersaw projects including “Honeymoon With Harry” and “West Texas United” with Russell Brand attached.

Chernin has been working in the talent department at “Saturday Night Live” where she helped identify emerging comic talent. Her role at Gulfstream calls for focusing on comedy development in features and TV.

Phelps has worked at Paramount’s motion picture creative group and at UTA. Chernin and Phelps will report to Rosen.