Singer Lee Roy Parnell is slated to play the role of Buster Tarvin on an upcoming Walker Texas Ranger, starring Chuck Norris on CBS-TV. The show, which airs on November 21st, also features Mark Collie as Danny Tarvin and John Anderson as J.J. Tarvin. PLUS! New artist Charlie Robison, soon-to-be-husband of of Dixie Chick Emily Erwin, is slated for scenes with ER actress Julianna Margulies in an upcoming movie entitled The Big Day. Reportedly, Robison latched the part with the help of buddy and Top Gun actor Barry Tub. ALSO! Up-n-coming actress Jamie Dudney, daughter of Barbara Mandrell, has reeled in a nomination for Best Female Newcomer from Soap Opera Digest. Dudney, who plays a part on As The World Turns, is up against One Life To Live newcomer Erica Page, Bryan White's girlfriend. The awards air on NBC on February 26th.