Sully

st notably, though, there was one time when Biff actually listened to what Sully had to say. This was during the introduction to "This Song is For the Birds". The only thing was, Sully whispered in Biff's ear, so we couldn't hear him. Also, in A Muppet Family Christmas, Sully can clearly be seen singing along in the big chorus numbers. In addition to working in construction, Sully is good at playing the piano. However, Biff is sometimes oblivious to this. In the early 1990s after Richard Hunt's death, Sully was performed by David Rudman.[2]

Two construction-worker Anything Muppets who looked similar to Biff and Sully made background appearances in the "Outrageous Makeover: Home Edition" sketch. (First: Episode 4132) Also, a stagehand that looked like Sully appeared in the "Survivor: Musical Chairs" sketch. (First: Episode 4134)

The duo made a non-speaking cameo in a Season 40 episode.