Stephen Gustafson is a former child actor who appeared as one of the kids in Sesame Street Episode 0008, where he's called Steve, participates in "If You're Happy and You Know It" with Susan, and drives imaginary vehicles with Gordon.
Gustafson went on to appear regularly on another Children's Television Workshop series, The Electric Company, as Buddy, a member of the Short Circus. His other credits include an ABC Afterschool Special, episodes of Shazam! and the KCET anthology Visions, and the two-part TV movie The Dark Secret of Harvest Home (with Bette Davis).