Today is the last chance to buy a Mega Millions ticket for $2. Here's when ticket price rises to $5 and other changes coming to the game next week.

Mega Millions lottery tickets will increase in cost, include the multiplier, start with a bigger jackpot and have new odds.

The price of Mega Millions tickets more than doubles starting Saturday as a new version of the game is rolled out. Why it matters: U.S. lottery sales are big money as Americans play in hopes of winning a life-changing jackpot.