Peter Sellers on the Muppet Show
Wonderful, weird, and indicative enough of Sellers’ personality to make it to his wikip page:
Sellers was reticent about discussing his private life. On The Muppet Show (season 2), in a “backstage” chat with Kermit the Frog, Sellers declined to step out of character, explaining comedically he had “no real me,” as he had it “surgically removed.”
Source: youtube.com