Alliance Atlantis and CanWest Global Update Acquisition Plans

TORONTO, March 28: CanWest
Global Communications Corp.’s acquisition of Alliance Atlantis Communications
Inc is expected to be completed in July or early August of this year, the two
companies announced today.

As announced on January
10, 2007, Alliance Atlantis entered into a sale agreement with Acquireco, a
corporation wholly owned by CanWest. A special meeting of shareholders of
Alliance Atlantis has been called for April 5, 2007 in Toronto to consider a
special resolution to approve CanWest’s acquisition of Alliance Atlantis.

Alliance Atlantis offers
Canadians 13 specialty channels and also co-produces and distributes the hit CSI franchise. CanWest Global Communications Corp. is
Canada's largest media company. In addition to owning the Global Television
Network, CanWest also owns, operates and/or holds substantial interests in
daily newspapers, and conventional television, out-of-home advertising,
specialty cable channels, web sites and radio stations and networks in Canada,
New Zealand, Australia, Turkey, Singapore, the U.K. and the U.S.