Duff has been acting professionally since the age 12, getting her start in the 1997 miniseries "True Women." Her small screen credits include recurring roles on "Boston Public," "Lizzie McGuire," "Joan of Arcadia" and "7th Heaven." She appeared in the film "Napoleon Dynamite." A singer/songwriter, she wrote songs for sister Hillary Duff's albums, and the two have also performed together. This summer she will be seen opposite her sister in the movie "Material Girls."

Hairspray tour star Aaron Tveit will begin Broadway performances as Link Larkin on July 18, the same day as his love interest, Amber Von Tussle (Haylie Duff).

Isabel Keating (who was Tony Award nominated for playing Judy Garland in The Boy From Oz) joined the company as Amber's mom Velma Von Tussle on June 6. Lisa Jolley stepped into the roles of Prudy Pingleton, Gym Teacher, and Matron on July 4. She replaced Julie Halston who was with Hairspray for almost two years. Halston is to co-star in the new CBS sitcom "The Class."

Recently, the musical also welcomed a new Edna Turnblad, Blake Hammond, and a new Penny Pingleton, Caissie Levy.

Earlier this spring Hairspray hosted "American Idol" runner-up Diana DeGarmo as Penny Pingleton. DeGarmo will rejoin the company on Sept. 8. Still appearing is R& B singer Tevin Campbell, who plays Seaweed Stubbs. Hairspray currently stars Shannon Durig as Tracy Turnblad, Stephen DeRosa as Wilbur Turnblad, Darlene Love as Motormouth Maybelle.

The musical comedy based on the film by John Waters has a book by Mark O'Donnell and Thomas Meehan, and songs by Marc Shaiman and Scott Wittman.

Hairspray currently plays Tuesday and Thursday at 7 PM; Wednesday, Friday and Saturday at 8 PM; Wednesday and Saturday at 2 PM; Sunday at 3 PM at Broadway's Neil Simon Theatre, 250 West 52 Street.

For more information, visit www.hairsprayonbroadway.com.