Foster, who is currently starring in the award-winning musical The Drowsy Chaperone, appears in an episode entitled "Johnny's Sister Tina; Spritesgiving." The program will also feature an appearance by Tartaglia's Avenue Q co-star Natalie Venetia Belcon, who is a series regular.

"Johnny and the Sprites" — which teaches children "about magic in the world around them" — airs on the Disney Channel at 10 AM ET; check local listings. The upcoming episode is described thusly: "Johnny's sister Tina visits; all of the vegetables in Grotto's Grove have the Forgetful Fungus."

Sutton Foster received a Tony nomination for her work in the new musical The Drowsy Chaperone at the Marquis Theatre. The singing actress starred in the title role of Thoroughly Modern Millie and received the Tony, Drama Desk, Outer Critics Circle and Astaire awards for that performance. She also received a Tony nomination for her performance in Little Women, and her other Broadway credits include roles in Les Misérables, Annie, The Scarlet Pimpernel and Grease!. Foster's regional and tour credits include What the World Needs Now, Dorian, Three Musketeers, South Pacific and The Will Rogers Follies.

For more information visit www.disney.go.com/disneychannel.

Sutton Foster, John Tartaglia and The Sprites.

Sutton Foster and John Tartaglia thumb wrestle.

Sutton Foster as Tina and John Tartaglia as Johnny in "Johnny and the Sprites."