<P> Dontzig is an alumnus of the (fictional) State University of Santa Barbara and is a generous donor to the school . To write a letter of recommendation to the school in support of Jackson's matriculating, Dontzig has Jackson perform menial favors for him . </P> <P> Dontzig is the only character in Hannah Montana to be portrayed by two separate actors . Paul Vogt debuted the role in "Miley Get Your Gum", and his identical twin brother, Peter Allen Vogt, has performed the role ever since in the episodes "Torn Between Two Hannahs", "The Idol Side of Me", "Bad Moose Rising", and "Killing Me Softly with His Height". Paul returned in the episode "Killing Me Softly with His Height" in the role of Dontzig's sister, "Donna", who is a huge Robbie Ray fan . Dontzig also has a cousin named "Francesca" (Lisa Rinna) who is also a Robbie Ray fan . </P> <P> Susan B. Stewart portrayed by Brooke Shields (season 2--3) was Robby's wife and Miley and Jackson's mother . Susan is the daughter of Grandma Ruby . She died three years prior to season one, but is often mentioned by the Stewarts and appears in household pictures . She also appears in person in three episodes by way of old home videos and various dream sequences . These are "I Am Hannah, Hear Me Croak", "The Way We Almost Weren't", and "He Could Be the One". </P> <P> Although they were both from Tennessee, Robby and Susan first met on the West Coast in a small roadside cafe off Interstate 10 . Susan was working as a waitress at the cafe during her college days and Robby visited while driving home to Nashville . Robby claimed he fell in love with Susan immediately, and that he knew that Susan loved him too because she laughed at all his jokes . However, when Robby first asked Susan out she turned him down because she was already dating someone else . But with a little encouragement from Aunt Dolly, Robby persisted and Susan finally went out with him . Robby tells Oliver that he first got Susan to go out with him by using the line "My name is Robby, hi' ." </P>

Who played miley's mom on hannah montana