He is expected to face questions on the crisis in Ukraine.
CBCNews.ca is carrying the event live starting at 11 a.m. ET.
Russian President Vladimir Putin signed a treaty Tuesday to annex Crimea, describing the move as correcting past injustice and a necessary response to what he called Western encroachment upon Russia's vital interests.
Putin said, in an emotional 40-minute speech, "in people's hearts and minds, Crimea has always been an integral part of Russia."
Prime Minister Stephen Harper announced on Monday further sanctions against Russians and Ukrainian officials.
More to come