NBC says the series finale of its Pennsylvania-set sitcom "The Office" has been extended to 75 minutes.

"Months after the airing of the documentary, the workers of Dunder Mifflin, past and present, gather for a wedding and a final round of interviews," said a synopsis released by NBC Tuesday.

 "Mysteries are solved, hatchets are buried, pranks are prunked. Guest stars include Mindy Kaling, BJ Novak, Rachael Harris, Dakota Johnson, Joan Cusack, Ed Begley Jr., Malcolm Barrett, Matt Jones, Andy Buckley, Mike Schur and Bobby Ray Shafer."

The show stars Rainn Wilson, John Krasinski, Jenna Fischer, Ed Helms, Catherine Tate, Leslie David Baker, Brian Baumgartner, Kate Flannery, Angela Kinsey, Oscar Nunez, Phyllis Smith, Paul Lieberstein, Creed Bratton, Craig Robinson, Ellie Kemper, Clark Duke and Jake Lacy.

Insiders have long denied Steve Carell, who starred on the show for seven seasons before leaving to pursue his film career, will return for the finale, but fans remain hopeful he will make a cameo.

The last installment of the iconic workplace comedy is to air from 9-10:15 p.m. ET May 16.

The serial-killer drama "Hannibal" will follow the series finale of "The Office," airing from 10:15-11 p.m. ET with limited interruption, NBC said.