LOS ANGELES (AP) — The “Saturday Night Live” 40th anniversary special apparently is bursting at the seams with talent.

NBC said Thursday it’s expanding the special by a half hour, to a total of 3 1/2 hours.

Everyone who has been an “SNL” regular, guest host or musical guest has been invited. Attendees announced so far range from Dan Aykroyd, Alec Baldwin and Robert De Niro to Kanye West, Betty White and Kristen Wiig.

“SNL” debuted as “NBC’s Saturday Night” on Oct. 11, 1975, with comedian George Carlin as host, and Billy Preston and Janis Ian as its musical guests. NBC is rebroadcasting that first episode Saturday at 11:30 p.m. EST.

The “SNL 40th Anniversary Special” airs Sunday from 8 to 11:30 p.m. on NBC.