Ed McMahon (1923-2009) guest-starred on episode 205 of Muppets Tonight.
He was the announcer for The Tonight Show with Johnny Carson on which the Muppets appeared several times.
For years he was also the announcer on Jerry Lewis' MDA Telethon on which Johnny Fiama and Sal Minella have appeared.
Guy Smiley spoofed McMahon in the 1974 special Out to Lunch in a Tonight Show parody with Cookie Monster playing Carson.
The unmade Muppet television special Johnny Carson and the Muppet Machine was to have included a scene with a talking boulder bearing McMahon's image.
McMahon voices himself in the Muppet Babies episode "This Little Piggy Went to Hollywood," where he invites Baby Piggy to appear on Star Search.