Tommy Chong is a Canadian-American actor, comedian, and musician, best known for his role in the comedy duo Cheech and Chong. Born on May 24, 1938, in Edmonton, Alberta, he gained fame in the 1970s for his stoner comedy films that often addressed themes of cannabis culture. In addition to his work in film, Chong has appeared in various television shows, including That '70s Show, where he played the character Leo. He is also an advocate for the legalization of marijuana and has authored several books on the subject, sharing his experiences and views on cannabis use.