There are some restrictions Illinois residents need to know about.
WATCH: Newsviews Part 1
Newsviews: Recreational Marijuana Becomes Legal In Illinois
Adults must be aged 21 and over to purchase and use marijuana, and marijuana must be purchased at a dispensary.
Toi Hutchinson, the senior adviser to Governor JB Prtzker for cannabis control, stopped by ABC7 to explain what residents can expect when becomes legal on Jan. 1.
"We'll have places open and ready for business by 6 a.m.," Hutchinson said. "We think we're going to have between 30 and 35 dispensaries that'll be open on that day."
WATCH: Newsviews Part 2
Newsviews: Recreational Marijuana Becomes Legal In Illinois
This will be the first time in almost 80 years that cannabis won't be illegal anymore, at least at the state level, Hutchinson said.
Dina Rollman, Senior Vice President of Government and Regulatory Affairs for Green Thumb Industries, also stopped by ABC7 to describe the retail experience and what customers will encounter at marijuana dispensaries.
PREVIOUS COVERAGE:
Illinois Weed Legalization Guide
Illinois Weed Legalization Guide: Will your city or town sell marijuana?
Illinois medical marijuana dispensaries issued 'same-site' licenses to sell recreational weed
Chicago cannabis coordinator lays out do's and don'ts for legal weed in 2020