the only other Peanuts character to unconditionally accept Pig-Pen for who he is, even defending Pig-Pen's uncleanliness in one strip (which was re-used in A Charlie Brown Christmas and Peanuts): Charles Schulz admitted that he came to regret Pig-Pen's popularity, given the character's essentially one-joke nature; he utilized the character very rarely in the later years of the strip's run; Pigpen was featured in just over 100 of the 17,897 Peanuts comic strips that Schulz created (though still appearing commonly in the TV specials and movies of the franchise). Like most of Schulz's characters, Pig-Pen has (both with and without lines) appeared in many of the animated Peanuts television specials beginning in the 1960s, as well as all five movies. One time, his clean self was shown in a miniseries titled This Is America, Charlie Brown, where he is an astronaut aboard a futuristic space station, demonstrating how personal hygiene would apply in zero gravity. True to form, the clean Pig-Pen is immediately dirtied again when dirt is attracted to him magnetically. In the 1990s, he appeared (in an animated overlay against a live-action backdrop) in a series of television commercials for Regina vacuum cleaners where all the dirt is sucked off his body and filthy trousers by one of the company's products, arguably one of the few times where Pig-Pen remains clean. In 2015, Pig-Pen appeared in a commercial for All laundry detergent for a tie-in with The Peanuts Movie. In the commercial, Snoopy, dressed as a magician, puts a cloth over Pig-Pen and instantly makes him clean, causing Snoopy to get dirty. This is also one of the few times where he remains clean. Geoffrey Ornstein first voiced Pig-Pen in the 1965 movie A Charlie Brown Christmas. Although he also later played the role in Charlie Brown's All Stars!, other various actors have voiced him ever since. He last appeared in the Peanuts comic strip on September 8, 1999. That strip was very uncharacteristic of him in that it showed him embarrassed to the point of shame in his dirtiness, with none of the pride or sense of destiny that he expressed in earlier strips. Pig-Pen is very good at playing the drums, as shown in the special Play It Again, Charlie Brown. He is also shown playing the double bass, notably in A Charlie Brown Christmas, as well as in Happy New Year, Charlie Brown! He plays