PERFORMER Jerry Nelson
DEBUT 1973
PATTERN Large Lavender Live Hand

Biff and his niece, Roxie Marie.

Biff is a construction worker on Sesame Street who speaks with a gruff New York accent. His partner is Sully. Biff first appeared in Season 5,[1] and made periodic appearances through Season 30.

Biff often asks for Sully's opinion, but interrupts him before Sully gets a chance to even make a sound. He also tends to ask him questions and then eggs Sully on by repeating, "Huh? Huh? Huh?", a reference to a routine by comedy duo Burns and Schreiber. As performer Jerry Nelson said in an interview, "Sully wasn't so much Schreiber, but Biff was the Jack Burns character."[2] Biff often has trouble figuring out how to perform various tasks, and by the time he's figured it out, Sully has already finished it.

Biff has a niece named Roxy Marie. According to a 1989 episode, he also has four kids, one of whom is the infant Mary-Biff. In the song "Five Feet High and Rising," he mentions that he's married to a woman named Ethyl, but in a 1994 episode, his wife's name is Celeste.

According to Episode 3087, Biff attended P.S. 186 as a child, where he was the self-proclaimed counting ace.

He has sung songs such as "We Coulda," "Think of Your Fingers," "This Song is For the Birds," and appeared in "Do De Rubber Duck." He also appeared with Judy Collins in the song "One Thing Leads to Another," and with Johnny Cash in "Five Feet High and Rising."

The duo made background cameos in episodes 4204 and 4712.

A similarly named construction foreman, Bif, exists off-screen. Two construction worker Anything Muppets who looked similar to Biff and Sully made background appearances in the "Outrageous Makeover: Home Addition" sketch. (First: Episode 4132)


See also Biff and Sully Sketches

Book appearances


  1. The Deseret News: 1...2...3...4...5 for Sesame St.
  2. Nelson, Jerry Tough Pigs interview