Ms. O'Leary is set to appear in court October 29.
As well, New York-resident Richard Ruh, 57, has been charged with failing to exhibit navigation light while underway.
Gary Poltash, 64, died instantly after the collision and a woman identified as Susanne Brito, 48, was injured and died shortly after being taken to the hospital.
A NY man who was driving the other boat was also charged in connection with the incident.
Kevin O'Leary and Linda O'Leary attend the Tribeca Talks Panel: 10 Years Of "Shark Tank" during the 2018 Tribeca TV Festival at Spring Studios in New York City on September 23, 2018. The boats involved were reported to be a vessel used to tow water skiers and a bigger pleasure craft.
Police say the Canada Shipping Act is a federal responsibility, so the Public Prosecution Service of Canada will be managing the ensuing court processes.
"That's not a criminal offence, period", said Greenspan, one of Canada's most-prominent criminal defence lawyers, "and it shouldn't be characterized as criminal in any way".
". but we find it regrettable that the OPP has chosen to charge Mrs".
MUSKOKA LAKES, ON- Both parties have been charged after the fatal crash on Lake Joseph in August. However, she does appear on Kevin O'Leary's Instagram from time to time.
If Linda O'Leary is convicted, she faces a maximum sentence of 18 months in prison and C$1 million ($755,000) fine, police said.
And while Kevin O'Leary is definitely a successful businessman, it looks like Linda is no slouch. O'Leary is cooperating with law enforcement in their investigation into this tragedy. "My thoughts are with all the families affected".
Businessman Kevin O'Leary behind the wheel of one of his boats on Lake Joseph.
Soon after the boating accident, Shark Tank star Kevin O'Leary issued a statement denying that he was the person operating the boat.
Iowa Democrats approve 'satellite' caucuses as 'virtual' alternative
And almost two out of three told pollsters they're open to supporting someone other than the candidates they're now backing. Kamala Harris (D-Calif.), who has wrestled to remain her top tier candidate status, by 4 points, 52 percent to 48 percent.