That '70s Show packs up the polyester bellbottoms, Zeppelin 8-tracks and lava lamps when it ends its eight-season run Thursday, May 18 (8:00-9:00 PM ET/PT) on FOX. The series finale also marks the 200th episode milestone.

That '70s Show premiered on Aug. 23, 1998. Set in Point Place, Wisconsin, the series follows a group of friends who get by with a little help from each other. The show stars Mila Kunis, Danny Masterson, Laura Prepon, Wilmer Valderrama, Kurtwood Smith, Debra Jo Rupp, Josh Meyers, Don Stark and Tommy Chong. For seasons one through seven, Topher Grace and Ashton Kutcher were also regular cast members.

The series created some signature elements that made it a hit over the years, including the surreal dream sequences, the 360-degree basement scenes and the classic '70s score. Numerous '70s icons have stopped by to guest-star, including Danny Bonaduce, Alice Cooper, Marion Ross, Eve Plumb, Ted Nugent, Valerie Harper and Roger Daltrey from The Who. This season, Don Knotts, Mary Tyler Moore Tom Bosley and Isaac Hayes are joining the list. Additionally, Luke Wilson, Lindsay Lohan, Bruce Willis, Brooke Shields, Seth Green and Jessica Simpson have also guest-starred.

The show was ranked No. 1 among entertainment programming in its Wednesday night time period among Adults 18-49, Adults 18-34, Men 18-49/18-34/25-54 and Teens. That '70s Show also ranks in the Top 10 primetime comedies of the season among Adults 18-34 (No. 9) and Teens (No. 8) [out of 47 regular 6-net comedies].

"The reason That '70s Show has been such a smash hit is due to the talent: the actors, the writers, the director, and everybody else who helped make each episode so groovy," said executive producer Tom Werner. "Has it really been eight years?"

"That '70s Show is one of our longest-running hit comedies," said Peter Liguori, President, Entertainment for FOX. "The show's success is definitely a testament to the creativity and dedication put forth each week by the talented cast, outstanding writers and producers, and the great crew. There are a lot of things about the '70s we'd like to forget – especially those involving polyester – but this series has been a wonderful look back at this most memorable decade."

That '70s Show is a Carsey-Werner production created by Bonnie Turner, Terry Turner and Mark Brazill. Marcy Carsey, Tom Werner, Dean Batali, Rob DesHotel and Mark Hudis are executive producers.