'SNL 40′ Adds Whoopi Goldberg, Glenn Close, J.B. Smoove

NBC's "Saturday Night Live" just added four more names to its expansive anniversary lineup.

Whoopi Goldberg, Glenn Close, J.B. Smoove and David Koechner are all set to appear on NBC's "Saturday Night Live's 40th Anniversary Special," TheWrap has learned.

Also Read: 'SNL 40′: Inside the NBC Sketch Show's Roaring Ratings Highs and Looming Lows

The tribute to the network's iconic sketch-comedy show, airing live this Sunday from 30 Rock in New York, will feature 59 other big names, including Eddie Murphy, Chevy Chase, Bill Murray, Jimmy Fallon, Adam Sandler, Tina Fey, Amy Poehler, Will Ferrell, Garrett Morris, Chris Rock, David Spade and Norm Macdonald.

See the full list of "Saturday Night Live" featured guests here.

As TheWrap previously reported, NBC has added an extra 30 minutes to its upcoming "SNL 40th Anniversary Special." Now, Sunday's sketch comedy tribute will last three-and-a-half hours, stretching from 8 p.m. to 11:30 p.m.

Also Read: Matt Lauer Goes Behind the Scenes at 'SNL' With Creator Lorne Michaels (Video)

New episodes of "SNL" generally air on Saturday, but this week NBC plans to air the sketch comedy show's Oct. 11, 1975 debut in its place, which featured host George Carlin.

"SNL 40th Anniversary Special" airs live on NBC at 8 p.m. on Sunday.

Tony Maglio contributed to this report.