'Sherlock' star Cumberbatch replaces Pearce for Whitey Bulger biopic

Benedict Cumberbatch has replaced Guy Pearce in the upcoming Whitey Bulger biopic.

The 'Star Trek Into Darkness' actor has been signed up to replace the 'Prometheus' star in the untitled project starring Johnny Depp as convicted murderer and organised crime figure Bulger, who is currently serving two life sentences in an Arizona prison.