Ontario Lottery and Gaming says an estimated $121 million is up for grabs in the Lotto Max and Lotto 6/49 lotteries this weekend.

Tonight's Lotto Max is offering its biggest jackpot — an estimated $55 million — along with about $30 million in MaxMillions prizes.

Tomorrow's Lotto 6/49 jackpot is expected to be $35 million, in addition to the guaranteed million-dolllar prize draw.

Since its launch in September 2009, Ontario Lotto Max players have won more than $2 billion in prizes.