The movie is being produced by Working Title partners partners Tim Bevan and Eric Fellner and written by John Hodge ("Trainspotting").
IFC's "Ain't Them Body Saints," Sony Classics' "Kill Your Darlings" and Uni's "Lone Survivor" opposite Mark Wahlberg.
Variety's sister site Deadline.com first reported Foster's potential attachment to the Armstrong project.
Foster is repped by WME.
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