Can a 17 year old driver have unlimited passengers in Illinois?

No, a 17 year old driver in Illinois cannot have unlimited passengers.

According to the Illinois Secretary of State, a 17 year old driver with a learner's permit may only drive with a parent, legal guardian, or driving instructor in the front seat. Once a 17 year old obtains their driver's license, they may not drive with more than one passenger under the age of 20 unless accompanied by a parent or legal guardian. These restrictions apply until the driver turns 18 years old.