Recently seen on Desperate Housewives, Kathy Najimy is returning to ABC.

The actress has landed a key role on Ugly Betty: she's signed on to portray the orthodontist that removes Betty’s iconic braces on an upcoming episode, as first reported by Entertainment Weekly.

Najimy succeeds Jesse Tyler Ferguson (part of the Modern Family cast), who played the title character’s oral surgeon on season one and who returned last month for a guest-starring stint.

Najimy, who voiced Peggy Hill on Fox's King of the Hill, will also be involved in the March 24 fantasy storyline coming to the show: sources confirm her character will act as the guardian angel who shows Betty how her life would have been different, if she never had braces.

This episode will air three weeks prior to the series finale, which will feature a certain character's wedding.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.