To get a free slice, follow the #ElisMobile hashtag on Twitter to find out the location of Eli's Cheesecake Mobile, with the Big Slice handing out free cheesecake slices around Chicago.
Cheesecake fans can also stop by the Eli's Cheesecake Bakery Café, 6701 West Forest Preserve Drive, Chicago, to enjoy a free slice and savings on all dessert purchases from 8 a.m. to 6 p.m.
For more information, visit Elicheesecake.com.
Eli's isn't the only celebrating National Cheesecake Day. The Cheesecake Factory restaurants will have half-price cheesecake all day long, but there is a limit of one slice per person at 50-percent off.
Also, all customers dining at Texas de Brazil restaurants Tuesday can get a free slice of cheesecake to celebrate the day.