B
- Lauren Bacall
- Backstreet Boys, singing "Just One Voice" with Elmo
- Batman
- Beetle Bailey
- Carl Banks, one special: Banks, a New York Giants player, appears during the celebrity performance of "Put Down the Duckie" in Put Down the Duckie: The Sesame Street Special.
- Tyra Banks
- Tiki Barber—defined "quest" and helped sing "Set Your Piggies Free"
- David Beckham acted out the word "persistent" with Elmo
- Harry Belafonte
- Joshua Bell
- Richard Belzer both appeared on the show and they have a puppet that strongly resembles him
- Miri Ben-Ari
- Annette Bening
- Tony Bennett sings alphabet song
- Candice Bergen lip-synced "C is for cookie"
- Corbin Bernsen
- Beyoncé- acted out the word "frustrated"
- Jason Biggs
- Tempestt Bledsoe
- Jack Black - discusses octagons with Elmo and disguises in another clip
- Dan Blocker
- James Blunt (singing about triangles in episode 4144)
- Andrea Bocelli singing a lullaby to Elmo based on the song "Time to Say Goodbye"
- Lisa Bonet
- Victor Borge
- Wayne Brady
- Drew Brees
- Amy Brenneman
- Garth Brooks
- Alton Brown
- Chris Brown (Episode will be pulled from broadcast due to Brown's recent arrest.)
- Kobe Bryant, explaining the word "miniature"
- Buck 65, one segment: The Canadian hip-hop artist performed a song called the 'Grocery Store Rap' on the show.
- Carol Burnett
- Barbara Bush
- Laura Bush, one segment: In episode 4032, the First Lady reads an original book called Wubba Wubba Wubba to Elmo, Big Bird, and some children. Bush has also appeared on international adaptation of the series Alam Simsim in Egypt and Galli Galli Sim Sim in India.
- Reggie Bush, discussed the word "appetite" in Music Magic.
- Kerry Butler
Read more about this topic: List Of Guest Stars On Sesame Street