Robert Wisdom and Jodi Lyn O'Keefe have joined the cast of the Fox drama "Prison Break" as regulars.

They will play new characters on the 20th Century Fox TV-produced drama, which has Michael Scofield (Wentworth Miller) and the gang locked up in a Panama prison.

Wisdom will play Luchero, a Panamanian drug kingpin who is incarcerated and controls the other inmates. O'Keefe will play Betty Crocker, an operative for the Company, a shadowy government conspiracy organization.

Production on the third season of "Prison Break" is slated to begin July 2.