The Ann Arbor Hash Bash organizers announced Monday that comedian Tommy Chong and activist John Sinclair will attend this year's marijuana-themed festivities.

Tommy Chong, Shelby Chong and Cheech Marin at the Michigan Theater on the day of the annual Hash Bash in Ann Arbor in April 2010.



The Twitter announcement came less than three weeks before the 44th annual event, which will take place on and around the University of Michigan campus April 4.

The event typically includes a rally on the Diag at the center of campus, followed by the Monroe Street Fair and an after party at the Blind Pig on First Street.

Last year, approximately 8,000 people attended the pro-pot rally. Speakers included Iraq War veteran Dakota Serna and State Representatives Jeff Irwin and Mike Callton, representing both sides of the aisle.

It is unclear what roles Chong and Sinclair will play at this year's event.

Ben Freed is a general assignments reporter for The Ann Arbor News. Email him at benfreed@mlive.com and follow him on twitter at @BFreedinA2. He also answers the phone at 734-623-2528.