Liberal Party president Steve MacKinnon announced 5,627 delegates and substitute or alternate delegates registered for the convention.
"makes this the largest delegated convention of this kind in the country," he said. "This is a great story."
That number includes 748 ex-officio delegates – MPs, Senators, defeated candidates, riding association officials and other party officials – who hold some sway, presumably, with others in the party.
There are also 2,985 other participants, including: media and other observers, such as Conservative, Bloc Québecois and New Democratic party observers.
MacKinnon announced registrations are now closed, but a few exceptions were made for a group of about two dozen late arrivals who got stuck on Hwy.20 en route to the convention, where there was an accident.
MacKinnon would not release the numbers of delegates that each leadership camp managed to successfully get to the convention.
First ballot results are expected to be released after 11:30 p.m.